Just call one of the interactive functions in this file to complete
the corresponding thing using `ivy'.

Currently available:
- Symbol completion for Elisp, Common Lisp, Python and Clojure.
- Describe fuctions for Elisp: function, variable, library, command,
  bindings, theme.
- Navigation functions: imenu, ace-line, semantic, outline
- Git utilities: git-files, git-grep, git-log, git-stash.
- Grep utitilies: grep, ag, pt, recoll.
- System utilities: process list, rhythmbox, linux-app.
- Many more.