Added 64 bit support. Dubrovnik now links to a 64 bit Mono framework in /Library/Frameworks/Mono64.framework
System.Nullable type handling improved.
64 bit compatability changes.
Added -lpthread to linker other flags as per output of pkg-config
Install directory changed to @rpath
Added method to allow assembly root configuration
Added trace argument notes and implemented workaround for unpredictable -terminate crash.
Improved exception handling. Refactored helper method invocation. Updated README for 64 bit.