(Mac OSX)  Improve Quick look and syntax highlighting under OSX

An exported UTI declaration means that the type is available for use by all other parties.
By adding an this declaration for ino files, it allows Quick Look to display file content and
external editors (like Xcode) to automatically syntax highlight .ino files as C++
Merge branch 'ide-1.5.x' of github.com:dpslwk/Arduino into dpslwk-ide-1.5.x