Added AssemblyInfo.cs to OpenSim.exe
Updated Mono.Addins to version 1.2 (https://github.com/mono/mono-addins/releases/tag/mono-addins-1.2). Also included mautil.exe, the command line application for managing mono addins.
Added SharpZipLib's license.
Updated OpenSim-as-addin version from 0.5 to 0.8.1. The addin version number doesn't need to match the release version number, but I think it's a very good idea that they do.
WARNING: BREAKING CHANGES FOR REGION MODULE DEVELOPMENT.
This cleans up Opensim's use of mono addins. In particular, the extension points /OpenSim/RegionModules and /OpenSim/WindModule moved from OpenSim.exe to OpenSim.Region.Framework.dll. From here on, developers of region modules should declare their dlls to be dependent on OpenSim.Region.Framework, starting with version 0.8.1
Additional changes:
- Addins version uniformly updated to 0.8.1. These numbers should be compatible with the release numbers or else it becomes very confusing.
- Mono addins directives moved from files addins.xml to embedded directives in the class and assembly declarations, to make it all consistent
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
This cleans up versioning. Specifically:
- It establishes 4 digits for opensim versions
- It uses the same number between opensim releases and mono addins versions

It also eliminates the last addin.xml files that were still there, for consistency.
Renamed VERSION_NUMBER to VersionNumber