Squashed 'bin/' changes from d0194bb..774bdc3

774bdc3 Check modified files, pass select JS to jshint, run phpunit in vagrant
bc955c7 Fix pre-commit detection of staged_php_files

git-subtree-dir: bin
git-subtree-split: 774bdc3be5ba985f15ef4eefea94dd0dc5baac1c
Merge commit '88252906994452f571f27bf77609a9f76f613669'