Updated external audio libs for iOS
Renamed flac to FLAC
Added OS X frameworks: ogg, vorbis, vorbisfile, vorbisenc and flac

 - Updated CMake installation script
 - The build script for the frameworks is available here: https://gist.github.com/mantognini/05460d9b6a8a272ed188
Updated Xcode templates

- The installation paths are no longer hard coded; cmake now configures them so that Frameworks and libs can be installed somewhere else.
- No longer copy sndfile.framework but instead copy the new dependencies of the audio module.
- No longer copy .DS_Store to the install directory.
Silenced some warnings
Fixed seeking after reaching EOF