When updating the CreatorId of an inventory item, automatically update the CreatorIdAsUuid field as well

Resolves http://opensimulator.org/mantis/view.php?id=6933
Refactored: ExternalRepresentationUtils should be the only place where the "CreatorData" field is calculated, to ensure uniformity

Resolves http://opensimulator.org/mantis/view.php?id=6933
Save to database these parcel updates: Force Owner, Abandon Request, Reclaim. (Previously these updates only changed the parcel in memory)

Resolves http://opensimulator.org/mantis/view.php?id=6934
Fixed: OnRegionInfoChange was never triggered

Resolves http://opensimulator.org/mantis/view.php?id=6934
Trim search queries (for users, groups, etc.). I have found that sometimes the viewer adds a space at the end, which causes searches to fail.

Resolves http://opensimulator.org/mantis/view.php?id=6935
When searching for users, don't add users from the local cache if they have an invalid UUID

Resolves http://opensimulator.org/mantis/view.php?id=6935
Check settings for groups module

Resolves http://opensimulator.org/mantis/view.php?id=6937
Don't show hidden groups in search results

Resolves http://opensimulator.org/mantis/view.php?id=6937
Fixed updating usersettings in the database

Resolves http://opensimulator.org/mantis/view.php?id=6938
If updating a user's profile notes fails then return an error

Resolves http://opensimulator.org/mantis/view.php?id=6938
HGAssetService searches for the "HomeURI" setting in several sections: Startup, Hypergrid, HGAssetService

Resolves http://opensimulator.org/mantis/view.php?id=6940