Refactoring/bugfixes.

Refactored Event.Type enum to src/groovy because of GRAILS-9627.

Renamed Event to LoggedEvent (someone online said Event was being
generated automatically and stuffing me up).

Added bn namespace to all my TagLibs

Added icons and tooltips to show comments when relationships are
defined.

Fixed bug where other peoples relationships, and relationships which
don't exist were shown as problems for logged in user.