moved src files to new src folder

All the files laying in the root folder of the project doesn't seem to be
supported by many general purpose tools. So everything was moved to src/
and the subfolder again was added, that the import has the same name as the
package should have. The test files where changed accordingly.

Signed-off-by: Erik Bernoth <erik.bernoth@gmail.com>
distutils support added

The setup.py is the standard file for handling package creation and
distribution in the python community. We decided to add this support to provide
all users with the ability to freely use monk.

Signed-off-by: Erik Bernoth <erik.bernoth@gmail.com>