Updated README.txt
Updating readme in preparation for next release
Cleanup output of Layout.save()

If cell name is made unique, represent it in the log output.
Also count normal elements and references separately in Cell.__str__().
Rephrase warning message for duplicate cells
Merge pull request #10 from mabl/output_cleanup

Cleanup output of Layout.save()
Update documentation to reflect the new behaviour of non-unique cell names
Update CHANGES
Merge readme docs from Matthias
Updated documentation for new version + added API to headerbar
Corrected indenting problem in README.txt