Export libobs cmake target, so external plugins can be built without ugly hacks
Fix dependency on win32-pthreads
Fix mav-avcapture dependencies
Fix absolute path detection
Use relative path in installed cmake file
Make include path more pretty
Also export a plugin destination, so external plugins know where to install stuff
Fix cpack problem
Add sse/mmx flags, so used intrinsics compile on 32bit
Merge pull request #77 from BtbN/cmake_export

Export libobs cmake target, so external plugins can be built