* On Mac OS X, if cmake fails to find Python with custom search path, default to using find_package.
* Fix formatting in CMakeLists.txt.
* Set CUSTOM_PYTHON_EXECUTABLE variable on mac if the custom search path fails.
* Require exact Python version match.
* Use cmake mode keyword for logging messages.
* Fix.
* Find python libraries in cmake by searching near the include directories.
* Update cmakelists for numbuf.