Correcting column types for 0.11
Merge branch '0.11'
	adding column type integer

Conflicts:
	setup.py
allow modify ticket parent child both are closed
Merge remote-tracking branch 'ronnywang/master'
Merge remote-tracking branch 'gaod/master'
Add database migration support
Update minor version number
Refs #27: Modified `validate_ticket` so that individual messages are reported for each valid ticket and the parent list is fixed-up to remove all invalid ticket. Modified `post_process_request` to avoid an exception during auto-preview.
Fix an error which throws away incoming data on preview