Documentation enhancement

[robertodr]

It might be useful to add a "Dependencies" section to the documentation of the modules. I did it for python_libs.cmake http://autocmake.readthedocs.org/en/latest/module-reference.html#python-libs-cmake but it's not parsed correctly by Sphinx, most likely because it doesn't know about this section.

[bast]

You need an empty line after the colons (Sphinx standard).