Add Python support to CMake utilities
Add Python support to CMake utilities

Teach lcm_wrap_types to produce __init__.py for Python packages, to fill
PYTHON_SOURCES, and to include Python files in the list of generated
files when Python generation is requested.

adeschamps/lcm,bluesquall/lcm,adeschamps/lcm,lcm-proj/lcm,adeschamps/lcm,lcm-proj/lcm,bluesquall/lcm,adeschamps/lcm,adeschamps/lcm,adeschamps/lcm,lcm-proj/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,bluesquall/lcm,bluesquall/lcm,adeschamps/lcm,bluesquall/lcm,lcm-proj/lcm,adeschamps/lcm