Increasing the Flowstate.Size db field from 6 to 255 chars

The reason is that 6 vs 255 characters doesn't provide any real benefits and running this under mysql it might just silently truncate to 6 chars without any errors.
Adding simple docblocks
Removed obsolete migration task
Corrected some docblocks in the javascript (minor)
Removed empty newlines in Flowchart_EditForm.ss
Merge pull request #8 from stojg/dod

Some minor fixes and touchups