* the Windows binary release now requires CUDA 8.0
* major changes to the way 'make install' works when building from source
* removed GPU memory size restrictions for FDK
* added multi-GPU support to 3D FP/BP/FDK
* added relaxation factor option to SIRT, SART
* fixed certain projections parallel to XZ or YZ planes
* fixed accumulating multiple raylengths in SART
* for matlab OpTomo, make output type match input type
* for python OpTomo, add FP/BP functions with optional 'out' argument
* fixed problems with non-US locales