Added modules for finding Python libraries.

FindPythonModule.cmake offers the find_python_module() function,
which acts similarly to the simple invocation form of
find_package().

FindPythonCython and FindPythonNose are two specific cmake
scripts that use FindPythonModule to check for the presence
of their respetive packages.
Added modules for finding Python libraries.

FindPythonModule.cmake offers the find_python_module() function,
which acts similarly to the simple invocation form of
find_package().

FindPythonCython and FindPythonNose are two specific cmake
scripts that use FindPythonModule to check for the presence
of their respetive packages.
Merge branch 'feature/find+python+module' of github.com:halfflat/CMake into feature/find+python+module

Conflicts:
	FindPythonModule.cmake
Message cache bugs fixed, simpler API for FindPythonModule.cmake

Incorporating elle's recommendations, and fixing some bugs.
Naming convention of FindPythonFOO.cmake is that FOO is exactly
(i.e. with case, underscores) the name of the python module.
Merge pull request #164 from halfflat/feature/find+python+module

Feature/find+python+module