We have a Python API for jobmodules!

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.

src/libcalamares/PythonJobApi.cpp

@@ -0,0 +1,42 @@
+/* === This file is part of Calamares - <http://github.com/calamares> ===
+ *
+ *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "PythonJobApi.h"
+
+
+namespace CalamaresPrivate
+{
+
+PythonJobInterface::PythonJobInterface( const Calamares::PythonJob* parent )
+    : m_parent( parent )
+{}
+
+
+std::string
+PythonJobInterface::prettyName() const
+{
+    return m_parent->prettyName().toStdString();
+}
+
+std::string
+PythonJobInterface::workingPath() const
+{
+    return m_parent->m_workingPath.toStdString();
+}
+
+}