Merge pull request #2 from vmarkovtsev/master

Added OpenCL error names based on #define-s from cl.h
Added Program properties from clGetProgramInfo
Merge pull request #3 from vmarkovtsev/master

Added Program properties from clGetProgramInfo
Set PYOPENCL_CTX to 0:0 only if it is not already set
Set PYOPENCL_CTX to 0:0 only if it is not already set
Merge branch 'master' of https://github.com/ajkxyz/opencl4py
Merge pull request #4 from vmarkovtsev/master

Added Kernel properties from clGetKernelInfo
Merge pull request #5 from vmarkovtsev/master

Added binary program creation feature
Changed version to 1.2.0
Fixed a bug in create_program when include_dirs parameter is not empty, added a test for it
Changed version to 1.2.1
Updated MANIFEST.in
Converted error codes to descriptions
Added get_kernel() to binary test (it is failed)