Fix Intel Ironlake since it doesn't support version 120 of GLSL. I don't have Ironlake so it is hard to test. Dropping the shaders to version 120 worked here for me, ATI may be giving me some slack though.
Add retina display support for Mac.
Use a brute force approach to test for Dual source blend support.
Sorry for a direct commit to the main branch but i need fast feedback, and i don't want to leave problematic code in the main branch for a long time.
if this approach does not work for the drivers with problems will transform dual source blend to an option in the D3D9 backend.
I appreciate the help of the people that tested my last commit and thanks to neobrain for pointing this solution.
Fix some typos and correct some capitalizations in the log messages.

Makes the logging look more orderly and less spammy when spitting out things.
Disable dual source blend until a valid support test is found