- Add support to run the unit tests for the rtemstoolkit python
modules from waf. Enter './waf test' for the tests to be run on
python2 and python3.
- Update the importing of rtemstoolkit modules to the standard
method which works on python2 and python3.
- Update the README.
Installing PYO and PYC does not work so disable this. Move the
Python check to the top level and have a single place.
Fix the install paths a revert the 'from . import' changes. This
is resolved by installing into the correct paths.