Change journal mode to WAL in db templates
Turn on wal for datastore also.
Simplify model save from the sink since wal decouples reads and writes completely.
Merge branch 'issue#356_no_data_widget' of git://github.com/sujeetsr/rockstor-core into sujeetsr-issue#356_no_data_widget

Conflicts:
	buildout.cfg
Update md5 sum for js-libs in prod buildout