moved files to new root folder
fixed references in code
fixed references in documentation
Merge branch 'feature/root-renaming'
renamed blackboard into message bus
improved behavior for unreachable host or closed port at DeviceManager.start()
changed super() calls into Python 2 compatible versions, made shure that all classes derive from object (new-style classes)
improved consistency of trace prints
Merge branch 'feature/python-2-6'
adjusted __all__ initializations
fixed doc string
added setup.py for setuptools
ignored setuptools build artefacts
added setup chapter to documentation
changed setup instructions