* Renamed TextureCache to AssetCache
* Plugged in new cache into AssetManager
* Removed OnAssetReceived global event from AssetManger
* RequestAsset and RequestInventoryAsset now take a delegate of type AssetReceivedCallback
git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@3004 52acb1d6-8a22-11de-b505-999d5b087335