Cleaning up how featured tutorials was done.
Merge pull request #693 from jdalphon/generalChanges

Cleaning up how featured tutorials was done.
Remove mongo and allow DB dump/load.
Merge branch 'master' of https://github.com/isenseDev/rSENSE into db-dump-and-load
Nil guard in migration.
A fix for issue #685
A fix for issue #697
Normalize data structures in Mongo.
Merge pull request #699 from jdalphon/jd_issue697

Fix save links
Merge pull request #696 from NatTuck/db-dump-and-load

Murder mongo, allow database-independent data dumps.
Merge pull request #698 from jdalphon/jd_issue685

Removed units for timestamp