Single function to add/commit/push gists (gpsgst)

other aliases/functions:
- untar: extract .tar files
- ideb: install .deb files
- dum: display directory sizes in terminal

dotfiles/vimrc

@@ -140,6 +140,8 @@ nnoremap <C-w> <C-W>|
 
 " leader mappings {{{ "
 let mapleader="\<Space>"
+" replace vim-commentary Markdown comments with HTML
+nnoremap <leader>cmt :%s/>\(.*\)>/<!---\1-->/g<CR>
 " reload file
 nnoremap <leader>e :e<CR>
 " reload folds