py bindings: remove extraneous function assignment operation
fix blur app
Fixed apps on OS X.

Must use CXX=g++ for the blur app at least (to get
openmp).
Merge branch 'master' of github.com:halide/Halide
Fix CUDA dev_malloc debug message to use correct format specifier for
elem_size (which is 32-bit, not size_t) and to omit the buf->dev value
which is always NULL when the message ir printed.
Merge branch 'master' of https://github.com/halide/Halide into windows