OS X fix: Bump up cogl to 1.16.2

Broken macro in 1.16.0 fails to compile on clang.

https://bugzilla.gnome.org/show_bug.cgi?id=738618
Disable deprecation error for NSOpenGLPFAFullScreen use on OS X 10.10

https://bugzilla.gnome.org/show_bug.cgi?id=738707
Workaround for numpy build failure on OS X 10.9, 10.10

Force a single-arch build for numpy; it was somehow trying to do
a universal 32/64-bit build but tried to combine two 64-bit builds.
Just set to a single arch.

https://bugzilla.gnome.org/show_bug.cgi?id=738745
Stub to create an .app bundle from built pitivi. Not yet working.
Merge branch 'master' of git://anongit.freedesktop.org/gstreamer/cerbero into osx-work3