New interfaces for "meta ontology elements"

Conflicts:
	src/ch/uzh/ifi/attempto/acewiki/gfservice/GFEngine.java
	src/ch/uzh/ifi/attempto/acewiki/gfservice/GFHandler.java
	src/ch/uzh/ifi/attempto/acewiki/gfservice/TypeGfModule.java
	src/ch/uzh/ifi/attempto/acewiki/gui/ArticlePage.java
	src/ch/uzh/ifi/attempto/acewiki/gui/WikiLink.java