Replace hard coded paths to Xcode.app with build environment provided paths
Update clang-format

This update includes a fix for NSDictionary literals when using Allman
or Always as the BreakBeforeBraces setting. See
http://llvm.org/bugs/show_bug.cgi?id=19854
Merge branch 'master' into clang-format-with-dict-literal-fixes
Accept more file extensions
Merge pull request #43 from superlukas/patch-1

Accept more file extensions (fixes #42)
Merge pull request #38 from tonyarnold/clang-format-with-dict-literal-fixes

Clang format with NSDictionary literal fixes
Add support for Xcode 6
Added Xcode 6 GM UUID
Merge pull request #53 from cojoj/xcode-6-gm

Added Xcode 6 GM UUID
Latest clang-format