Merge pull request #27 from BtbN/cmake

CMake Rewrite
Fix a few formatting issues

Fixed a few files that went over 80 columns, mostly just a nitpack on my
part.

libobs/obs-nix.c had a rather bad case of leading whitespace.

Also, fixed the x86 obs-studio project files so that it would properly
output to the right directory.  It couldn't find libobs.lib because
obs-studio's project settings had it outputting to a different place
than the rest of the projects.
Add explicit AppKit dependency for obs/platform-osx
Require cmake 2.8.12 on osx

This requirement is due to rpath usage in the project and SDK location
changes[1] in more recent osx versions

[1] i.e. http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=1fce189e
Update osx bundle files

The bundle icon now includes all recommended image resolutions and OBS
is now started as high resoltion application for high dpi displays,
still need to add high resolution images for icons used inside OBS
Fix copy&paste error in AppKit cmake module

Only consider AppKit_LIBRARIES