(Shell|Scripts|Emacs)~minor edits

+psearch function to search pacman with less (I use this all the time,
just makes it easier to do in one go)
~speed script to use a slightly larger file so user can get a better
estimate of dl speed
~ada-mode slightly better comments

Shell/.zshrc

@@ -27,6 +27,10 @@ ef () {
   sedit $(fzf)
 }
 
+psearch () {
+  pacman -Ss $1 | less
+}
+
 ### Git aliases
 alias gs="git status"
 alias gd="git diff"