snippets (new), Bash functions

- LaTeX: align, piecewise function
- snippets: tabstops, LaTeX environment
- .gitignore

snippets.snippets

@@ -0,0 +1,10 @@
+snippet ts "Tabstop"
+${${1:number}:${2:default}}	
+endsnippet
+
+snippet "b(egin)?" "begin{} / end{}" br
+\begin{${1:something}}
+	${0:${VISUAL}}
+\end{$1}
+endsnippet
+