This resolves GR-70.

It also addresses the part of GR-52 regarding getting notified of your own system’s changes.
Merge pull request #43 from CruGlobal/GR-70__improve_security_model

This resolves GR-70.
This resolves GR-70.

It also addresses the part of GR-52 regarding getting notified of your own system’s changes.
This resolves GR-70.

It also addresses the part of GR-52 regarding getting notified of your own system’s changes.
Update structure.sql to make travis happy
Merge branch 'GR-70__improve_security_model'
Update structure.sql to make travis happy
Merge branch 'GR-70__improve_security_model'
Add the ability to specify systems you trust.