Add files missing from the tarball to the relevant Makefile.am EXTRA_DIST statement
Fix permissions of files in karate plugin directory (source files don't need to be executable...)
Add compiled python scripts to CLEANFILES

... so dpkg-source doesn't complain about binary files being present upon build-clean-build
Remove files from tarball again that don't actually belong there

These are things apparently in the git repository for convenience, but
that aren't actually part of the code base -- so don't ship them in the
tarball
Make this 8 spaces rather than a tab, so that things line up nicely
Better cleaning of python files

- Add a dot, to clarify that this must be an extension
- Add the same to the tools/rdm Makefile (the other ones in the python
  directory already have it)
Merge pull request #378 from yoe/build-fixes

Build fixes