Improving cuda backend
Expose compiler info
Expose device
Merge branch 'devel' into _dev_cuda
Fix cuda profiling
Isolate CPU print implementation; should not be in builtin.
Fix gridsize
Add helper to insert string into CUDA constant addresspace
Add specialize() to compile a CUDA kernel to the given arguments.
Merge branch 'devel' into _dev_cuda

Conflicts:
	numba/targets/base.py
Set -O3 as default to enable SIMD code generation for vectorize ufunc
Merge pull request #465 from numba/_dev_cuda

Backend improvements