Merge pull request #120 from tanderegg/develop

Fix for mouse movement to rely on built in transform functionality
Disable support for 2x-sized framebuffers when running on rtina displays.
Added collision mesh scaling.
Merge pull request #122 from mcteo/develop

Added collision mesh scaling.
Merge pull request #121 from DeVaukz/develop

Fix a bug with Sigma on retina macs.
Updated the README. #80
Merge pull request #123 from danix111/new_readme

Updated the README.
Removed some moldy code and fix indenting
Merge branch 'develop' of github.com:adam4813/Sigma into specular-merge