Module descriptors are now module.desc, no configuration allowed inside.
Module config files are <modulename>.conf, installed in
share/calamares/modules.
settings.conf is read from /etc/calamares, then share/calamares, and if
running with --debug also in the current dir.
Module config files are read from /etc/calamares/modules, then
share/calamares/modules, and if running with --debug also in
src/modules/<modulename> relative to the current dir.
Created a Boost.Python module interface in libcalamares.
Added a PythonJob wrapper and exposed it in the Python module.
Rename target calamareslib ==> calamares so in Python it's libcalamares.
Python-related classes in libcalamares that aren't exported as C++
symbols are now in a CalamaresPrivate namespace.
Import the libcalamares python module into every Python script before
running it.
Added Python error handling to PythonJobHelper.
Added some more testing code to dummypython module.
