Switched to Zsh and consolidated all aliases

Resolves #21 and closes #30. Combined all alias files, converted them into
proper Zsh formatting and reorganized them into better sections.  Installed Oh
My Zsh and then sourced the combined aliases file (zsh_aliases) from .zshrc.
Also made URL's clickable in urxvt and briefly commented purpose of all Vim
plug-ins.

dotfiles/Xresources

@@ -1,8 +1,16 @@
 URxvt.font: xft:hack:size=11
 
+/* transparency {{{ */
 URxvt*inheritPixmap: true
 URxvt*transparent: true
 ! URxvt*shading: 0 to 99 darkens, 101 to 200 lightens
-URxvt*shading: 20
+URxvt*shading: 10
+/* }}} transparency */
 
 URxvt.scrollBar: false
+
+/* Clickable URLs {{{ */
+URxvt.perl-ext-common: default,matcher
+URxvt.url-launcher: /usr/bin/xdg-open
+URxvt.matcher.button: 1
+/* }}} Clickable URLs */

dotfiles/set-dotfiles.sh

@@ -1,7 +1,7 @@
 # Get directory variables from script.
 . ../dirs.sh
 # List of dotfiles I want to link to system.
-dotfiles="bashrc gitconfig inputrc vimrc Xresources"
+dotfiles="bashrc gitconfig inputrc vimrc Xresources zshrc"
 # cd $dot_dir
 for dotfile in $dotfiles; do
 	# Remove system dotfile.

dotfiles/vimrc

@@ -35,46 +35,82 @@ if empty(glob('~/.vim/autoload/plug.vim'))
 endif
 call plug#begin('~/.vim/plugged')
 
+" prequisite for other plugins
 Plug 'vim-scripts/L9'
+
+" find files from within Vim
 " Plug 'vim-scripts/FuzzyFinder'
-Plug 'whatyouhide/vim-gotham'
+
+" Gotham color scheme
+" Plug 'whatyouhide/vim-gotham'
+
+" collection of Vim color schemes
 Plug 'flazz/vim-colorschemes'
+
+" preview Vim color scheme easily within Vim
+Plug 'xolox/vim-colorscheme-switcher'
+" prerequisite for above plugin
+Plug 'xolox/vim-misc'
+
+" automatically save buffers upon returning to normal mode
 Plug '907th/vim-auto-save'
 	let g:auto_save = 1
+	
+" compile LaTeX PDF while writing the file
 Plug 'xuhdev/vim-latex-live-preview', { 'for': 'tex' }
+
+" provides various functionality for writing LaTeX in Vim
 Plug 'lervag/vimtex'
+
+" auto-completion for various languages
 Plug 'Valloric/YouCompleteMe'
-Plug 'Kevin-Mok/vim-snippets'
+
+" wrote short bits of text that expand into whatever you want
+" demo: https://www.youtube.com/watch?v=Zik6u0klD40
 Plug 'SirVer/ultisnips'
+	" better key bindings for UltiSnipsExpandTrigger
+	let g:UltiSnipsExpandTrigger = "<tab>"
+	let g:UltiSnipsJumpForwardTrigger = "<tab>"
+	let g:UltiSnipsJumpBackwardTrigger = "<C-tab>"
+
+" custom snippets
+Plug 'Kevin-Mok/vim-snippets'
+
+" to make YouCompleteMe work with UltiSnips (both use Tab)
 Plug 'ervandew/supertab'
+	" make YCM compatible with UltiSnips (using supertab)
+	let g:ycm_key_list_select_completion = ['<C-n>', '<Down>']
+	let g:ycm_key_list_previous_completion = ['<C-p>', '<Up>']
+	let g:SuperTabDefaultCompletionType = '<C-n>'
+
+" easily comment/uncomment lines
 Plug 'scrooloose/nerdcommenter'
 	let g:NERDTrimTrailingWhitespace = 1
 	let g:NERDSpaceDelims = 1
-Plug 'xolox/vim-misc'
-Plug 'xolox/vim-colorscheme-switcher'
+
+" add quotes/brackets around chunks of text easily
 Plug 'tpope/vim-surround'
+
+" navigate around file easily and precisely
 Plug 'easymotion/vim-easymotion'
+
+" status bar displaying various info about the current buffer
 Plug 'vim-airline/vim-airline'
 Plug 'vim-airline/vim-airline-themes'
-Plug 'dkarter/bullets.vim'
-Plug 'dylanaraps/wal.vim'
-" }}} vim-plug "
 
-" YCM/UltiSnips {{{ "
-" make YCM compatible with UltiSnips (using supertab)
-let g:ycm_key_list_select_completion = ['<C-n>', '<Down>']
-let g:ycm_key_list_previous_completion = ['<C-p>', '<Up>']
-let g:SuperTabDefaultCompletionType = '<C-n>'
-" better key bindings for UltiSnipsExpandTrigger
-let g:UltiSnipsExpandTrigger = "<tab>"
-let g:UltiSnipsJumpForwardTrigger = "<tab>"
-let g:UltiSnipsJumpBackwardTrigger = "<C-tab>"
-" }}} YCM/UltiSnips "
+" continue Markdown lists when started
+Plug 'dkarter/bullets.vim'
+
+" coordinate Vim color scheme with terminal color scheme
+Plug 'dylanaraps/wal.vim'
 
 call plug#end()
+
 " colorscheme gotham256
 colorscheme wal
 
+" }}} vim-plug "
+
 " Mappings {{{ "
 map <F3> :wa<CR>
 map <F4> :wqa<CR>

dotfiles/zshrc

@@ -0,0 +1,95 @@
+# If you come from bash you might have to change your $PATH.
+# export PATH=$HOME/bin:/usr/local/bin:$PATH
+
+# Path to your oh-my-zsh installation.
+  export ZSH=/home/kevin/.oh-my-zsh
+
+# Set name of the theme to load. Optionally, if you set this to "random"
+# it'll load a random theme each time that oh-my-zsh is loaded.
+# See https://github.com/robbyrussell/oh-my-zsh/wiki/Themes
+ZSH_THEME="muse"
+
+# Set list of themes to load
+# Setting this variable when ZSH_THEME=random
+# cause zsh load theme from this variable instead of
+# looking in ~/.oh-my-zsh/themes/
+# An empty array have no effect
+# ZSH_THEME_RANDOM_CANDIDATES=( "robbyrussell" "agnoster" )
+
+# Uncomment the following line to use case-sensitive completion.
+# CASE_SENSITIVE="true"
+
+# Uncomment the following line to use hyphen-insensitive completion. Case
+# sensitive completion must be off. _ and - will be interchangeable.
+# HYPHEN_INSENSITIVE="true"
+
+# Uncomment the following line to disable bi-weekly auto-update checks.
+# DISABLE_AUTO_UPDATE="true"
+
+# Uncomment the following line to change how often to auto-update (in days).
+# export UPDATE_ZSH_DAYS=13
+
+# Uncomment the following line to disable colors in ls.
+# DISABLE_LS_COLORS="true"
+
+# Uncomment the following line to disable auto-setting terminal title.
+# DISABLE_AUTO_TITLE="true"
+
+# Uncomment the following line to enable command auto-correction.
+# ENABLE_CORRECTION="true"
+
+# Uncomment the following line to display red dots whilst waiting for completion.
+# COMPLETION_WAITING_DOTS="true"
+
+# Uncomment the following line if you want to disable marking untracked files
+# under VCS as dirty. This makes repository status check for large repositories
+# much, much faster.
+# DISABLE_UNTRACKED_FILES_DIRTY="true"
+
+# Uncomment the following line if you want to change the command execution time
+# stamp shown in the history command output.
+# The optional three formats: "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
+# HIST_STAMPS="mm/dd/yyyy"
+
+# Would you like to use another custom folder than $ZSH/custom?
+# ZSH_CUSTOM=/path/to/new-custom-folder
+
+# Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
+# Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/
+# Example format: plugins=(rails git textmate ruby lighthouse)
+# Add wisely, as too many plugins slow down shell startup.
+plugins=(
+  git
+)
+
+source $ZSH/oh-my-zsh.sh
+source ~/linux-config/aliases/zsh_aliases
+
+# User configuration
+
+# export MANPATH="/usr/local/man:$MANPATH"
+
+# You may need to manually set your language environment
+# export LANG=en_US.UTF-8
+
+# Preferred editor for local and remote sessions
+# if [[ -n $SSH_CONNECTION ]]; then
+#   export EDITOR='vim'
+# else
+#   export EDITOR='mvim'
+# fi
+
+# Compilation flags
+# export ARCHFLAGS="-arch x86_64"
+
+# ssh
+# export SSH_KEY_PATH="~/.ssh/rsa_id"
+
+# Set personal aliases, overriding those provided by oh-my-zsh libs,
+# plugins, and themes. Aliases can be placed here, though oh-my-zsh
+# users are encouraged to define aliases within the ZSH_CUSTOM folder.
+# For a full list of active aliases, run `alias`.
+#
+# Example aliases
+# alias zshconfig="mate ~/.zshrc"
+# alias ohmyzsh="mate ~/.oh-my-zsh"