Changes:
* Corrected the eq-by-value? flag of pair classes to #t.
* Corrected a bug with <none> type.
* Optimized procedure calls.
* Optimized the equality predicates.
* Optimized checking primitive classes in match-type and is-instance?.
* Redesigned assoc and member? procedures in order to invoke the
equality predicate optimization.
* Improved linker error messages with procedure typing errors.
Theme-D homepage is located at
http://www.iki.fi/tohoyn/theme-d/
Theme-D can also be downloaded from
https://sourceforge.net/projects/theme-d/
- Tommi Höynälänmaa
