Handling all the exceptions in SafeGetExportedTypes and returning an empty array

Just handling all the exceptions and returning an empty array.

Since both exceptions that were on the original didn't do anything, and I had this strange exception with mono when loading the types I changed to handle/catch all the exceptions and just continue.

https://groups.google.com/forum/?fromgroups=#!topic/nancy-web-framework/Ol58Z2jjJCQ