Unicode Set version 0.11.0

Enhancements

• Add recurively defined sets to support compatibility with Posix classes. See Unicode.Set.Property.

Bug Fixes

• Fix various bugs in set operations for Union, Difference, Intersection abd Complement

• Correctly parse and interpret set complements such as [^[:^Sc:]] and more complex sets such as [^[[:Sc:]-[:^Lu:]]]