Updated portable projects to 1.2.0
Close to final 1.2.0

Lot of changes (see changeset). Most important: Rewrote the Parser,
Reorganized the project solution, improved documentation, improved some
types, improved the object-oriented model behind YAMP.
Merge branch 'master' into portable
Updated portable projects to "close to final 1.2.0"

Added dummy SaveFunction and LoadFunction classes in Portable.YAMP to
ensure that all ParseContext convenience methods compile sufficiently