v0.02.2
* Added scene format description to README
* Changed Color class to use doubles instead of floats
* Moved light sampling book-keeping into RenderState instead of LightServer
* Seperated out PhotonMap class into GlobalPhotonMap and CausticPhotonMap
* Reduced memory usage in global photon map after irradiance computation
* Reduced memory usage in Bitmap class
* Fixed variance calculation on adaptive AA
* Added madd (multiply and add) operator to Color class
* Irradiance Gradients
* Changed QMC sequence interface to include multi-dimensional sequences.

v0.02.1
* Initial public release