These job plugins work similarly to view modules, with the following
differences:

* These jobs need to link only libcalamares, not libcalamaresui. For
  this reason, PluginFactory was moved from libcalamaresui to
  libcalamares. (It depends only on QtCore.)

* Instead of deriving from ViewModule, derive from CppJob (which is a
  subclass of Job).

* Like process and Python jobs, a job plugin is a single job, whereas a
  ViewModule can generate a whole list of jobs.

The CppJob and CppJobModule classes are new. In Module::fromDescriptor,
the combination type=job, intf=qtplugin is now supported and mapped to
CppJobModule.

Point the lib/calamares/libcalamares.so symlink for the Python modules
directly to the versioned lib/libcalamares.so.VERSION library rather
than to the lib/libcalamares.so symlink. This allows distributions to
install the lib/libcalamares.so symlink to a development package and
only ship lib/libcalamares.so.VERSION and lib/calamares/libcalamares.so
in the runtime package. It is also marginally faster (because only one
level of symlinks has to be resolved instead of two).

(I know this works because I have been manually fixing up this symlink
in the Fedora specfile so far.)

Rename PythonJobHelper ==> CalamaresPython::Helper.
Add QVariant to boost::python::object conversion functions.
Rename some constants in the libcalamares Python API.

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.

This adds a submodule pointing to a fork of KDE Partition Manager. All
Calamares-specific changes are in the "calamares" branch of this fork.

Avoid name clashes with partitionmanager's config.h

Also fix config.h location.

Also switched to C++11.

Also DllMacro.h