Remove cpymad from source tree
Strip dependencies to cern.pymad from jpymad

The only dependencies came from

1. TfsTable/TfsSummary, which are now included in the jpymad source
2. Abstract base classes PyMadModel/PyMadService/PyMadModelDefinition,
   which are not really necessary in python.
Remove tests from Travis
Overwrite script in .travis.yml

The travis build currently only checks whether the setup.py runs.
Remove cpymad specific files from source distribution
Update documentation
Update and remove some demo scripts