Merge pull request #64 from EmilWestergren/master

Lots of minor improvements.
Fixed many more leaks.
Merge branch 'master' of https://github.com/cogneco/ooc-kean
Merge pull request #65 from davidhesselbom/master

Merged.
Fixed a few leaks.
Merge pull request #66 from davidhesselbom/master

Fixed a few leaks.
Added mipmap bool and now raising exception when trying to use unimplemented generateMipmap function.
Implemented generateMipmap for Yuv420Semiplanar.
Now sets mipmap to true when generating mipmap.
Fixed error in to3DTransformArray function, changed order of transforms and added function for converting to FloatTransform3D and returning array.