Implemented editing of a requirement, with Jason Whitehouse.
Added RequirementNotFoundException.
Added controller and observer for updating a requirement, with Fredric Silberberg.
Added cancel button and save button to edit view, Chris, Matt, Pat
Merge branch 'dev-set3-editreq' of https://github.com/333fred/wpi-suite-tng into dev-set3-editdetview
Added save button action, does not yet work, Chris, Matt, Pat
Added functionality to cancel button Matt, Pat, Chris
Added functionality to cancel button Matt, Pat, Chris
Fixed edit bug, with Fredric Silberberg.
Merge branch 'dev-set3-editdetview' of https://github.com/333fred/wpi-suite-tng into dev-set3-detview