refactor: Remove IClientNetworkServer.NetworkStop() in favour of existing Stop().

This was an undocumented interface which I think was for long defunct region load balancing experiments.
Also adds method doc for some IClientNetworkServer methods.
update libomv to git master which adds support for MaterialID in TextureEntry
Allow changes to TextureEntry to propagate to viewers when MaterialID changes
Thanks lkalif for a fix to SendRegionHandshake() which fixes a potential crash with Server-side baking enabled viewers
amend previous commit, a line was left out
Initial experimental support for materials-capable viewers. This is in a very early stage and this module is disabled by default and should only be used by developers for testing as this module could cause data corruption and/or viewer crashes. No materials are persisted yet.
remove default parameter value that apparently mono cant handle
Materials-capable viewers send ImageUpdate packets when updating materials that are normally sent via RenderMaterials CAP. This can cause a race condition for updating TextureEntry fields. Therefore filter any TextureEntry updates so they only update if something actually changed.
RenderMaterials POST Cap now return material entries when invoked with an OSDArray of MaterialIDs
handle PUT verb for RenderMaterials Cap
Small fix to prebuild xml for building with mono tools
Fix spelling
Materials persistence via SceneObjectPart.dynAttrs. This appears to work across region restarts and taking objects into inventory, but probably will not work across archiving via OAR or IAR as materials texture assets may not be adequately referenced to trigger archiving.
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
Clean up unused config and config comments.
Allow callers to set the invoice parameter for GenericMessage
BulletSim: fix crash when deleting llVolumeDetect enabled objects. Bullet's check for an object being linked into the world does not work for Bullet's ghost objects so BulletSim was deleting the object while it was still linked into the physical world structures.
Fix issue in ConciergeModule where UpdateBroker was sending malformed XML if any number of avatars other than 1 was in the region.

I don't know how well the rest of ConiergeModule works since I've practically never looked at this code.
Addresses http://opensimulator.org/mantis/view.php?id=6605
revert CSJ2K.dll to version in use prior to commit d4fa2c69ed2895dcab76e0df1b26252246883c07
BulletSim: improve avatar stair walking up. Add more parameters to control force
of both position change and up force that move avatars over barrier.
Default parameters are for steps up to 0.5m in height.