Fix .gitignore to hide DS_Store files.
Fix .gitignore to hide DS_Store files.

jtrudell/photobooth,bmt/photobooth,jtrudell/photobooth,bmt/photobooth,bmt/photobooth,jtrudell/photobooth,bmt/photobooth,jtrudell/photobooth,jtrudell/photobooth,bmt/photobooth