Pull all Clojure config inside config expression
Run cljr-update-artifact-cache in the background
Remove SLIME stuff from Clojure
Break out clj-refactor leading bindings
Stop flycheck from barfing all over the mode line
Move Cider and clj-refactor out of languages
Remove guide-key sequence for clj-refactor

It's useless because guide-key returns `Prefix command` for everything.

https://github.com/kai2nenobu/guide-key/issues/18
Setup Travis CI
Remove elpa task from Makefile
Disable email notifications from Travis CI