Add smex and ido-ubiquitous for better `M-x`
Merge branch 'master' of https://github.com/bbatsov/prelude
Correct the packages alphabetical order
Merge pull request #305 from toctan/master

Add smex and ido-ubiquitous for better `M-x`
A couple of minor improvements
Add some missing docstrings
Merge remote-tracking branch 'origin/master' into dev