Update to ctrlpvim/ctrlp.vim

kien/ctrlp.vim hasn't been update for over 1 year, and the ctrlpvim version is working better, especially it will order the files intelligently, showing first exact matches
Add elixir group to .vimrc.bundles
Fix missing endif in group Elixir
Add snipets support and mix compilation for elixir group
Merge pull request #703 from fabianhjr/3.0

Add elixir group to .vimrc.bundles
Merge pull request #702 from edi9999/patch-2

Update to ctrlpvim/ctrlp.vim
Merge remote-tracking branch 'upstream/3.0' into 3.0