Merge pull request #5 from kerryb/adam

Several changes
Change ,h to only dismiss highlighting until the next search instead of forever
Remove gutter comment underline
Update syntastic
Add Haml abbreviaitons when editing *.haml files
Swap vim-powerline for vim-airline
Revert "Add Haml abbreviaitons when editing *.haml files"

Too annoying for its own good.

This reverts commit bb59972dfa0a22224d833e93f742beb25ca8303b.
Have perl syntax look in ./lib
Binding tests to ,t and make ,, switch between files
Update vim-gitgutter
Fix projector mode font size substitution on Mac