Synced MT project with main project.
Fixed a bug for MonoTouch builds where resetting the http response stream position is not supported.
Cleaned up existing MonoTouch builds.
Added a new up-to-date 3.9.55 MT build.
Added a readme documenting a common issue to do with ServiceStack.Text AOT compilation and how to resolve it.
Merge pull request #774 from Its-Tyson/monotouch-fixes

Monotouch fixes