Update ChangeLog for release 0.9.1

Add things that were missing from the ChangeLog.md file i. e. issues
that were closed during this development cycle but were not mentioned
there.
Change version string for the emperor

The tests, scripts and the module had the following following strings
changed:
    - __license__ (some tests still had GPL listed under this attribute)
    - __version__
    - __status__
Merge pull request #200 from ElDeveloper/release_0.9.1

Release 0.9.1