Fix the xML formats to correspond to OpenSim's current formats

Always write Content-Length header

* Updating to HttpServer.HttpListner.Create()'s new ILogWriter requirement
* Updating to the new OpenSim asset POST format

Fixing typo in LogInventoryPurgeFolder() logging line in NullMetrics

* Updated the OpenSim asset handler to use the new asset POST protocol
* Switched from the libopenmetaverse fork of HttpServer to the "lite" branch hosted by the official C# WebServer project
* Fixed ForEach in SimpleStorage

* Added web OpenID auth path back in
* Added the AuthorizeWhitelist extension to whitelist access based on OpenID identities
* Continued work on the GridServer

Added null checks when serializing inventory item list and inventory folder list

* Renamed StorageResponse to BackendResponse
* Deleted old HttpServer cruft
* Continued work on GridServer

* Moved authentication checks from the backend to the frontend. This allows insecure frontends such as the OpenSim connectors, or partial information to be displayed such as the BrowseFrontend
* Fixed HTTP connection handling in OpenSimInventoryFrontend
* Continued work on GridServer, attempting to unify the interface architecture of AssetServer and GridServer

* Changed the inventory interface so an owner parameter is required for creating new inventory assets
* Removed the URI to UUID legacy mapping, an OpenSim-specific way of constructing owner URIs is used instead
* Fixed a bug in TextureRedirector prebuild config

Wrapping the legacy URI to UUID text file loading in a silent try/catch

* Legacy URI to UUID mapping (for dealing with OpenSim frontend and OpenSim MySQL backend) is now serialized to disk
* Added OpenSim MySQL inventory backend

* Changed Base64 decoding to work with Mono 1.9.1 (thanks Robert Adams for tracking this down)
* Fixed missing references in prebuild.xml

* Added WebServer logging
* Halved the number of database calls made in OpenSim asset requests
* Updated to the latest HttpServer.dll and OpenMetaverse.Http.dll

* Switched over from HttpListener to HttpServer.dll (better SSL support)
* Switched to a more recent Prebuild.exe (might make things work smoother for NAnt)
* Added debug logging to the null metrics provider

* Removed all JPEG2000 special handling, it can be added back in later when there is a good interface for content handling extensions
* Updated to a patched version of Prebuild.exe that lets NAnt compile everything into one directory
* Added System.ServiceProcess references to prebuild.xml in preparation for converting to a service

Switched over from UUIDs to URIs for any references to avatars (owners)

* Switched over to Prebuild, removed all project and solution files
* Shuffled things around to put AssetServer in its own folder
* Updated to the latest OpenMetaverseTypes.dll which now includes DoubleDictionary, ExpiringCache, and BlockingQueue