2007-03-01  Jürg Billeter  <j@bitron.ch>

	* vala/valatypereference.vala: improve equality check
	* vala/valatypeparameter.vala: add type parameter equality check
	* vala/valasemanticanalyzer.vala: add symbol dependencies for
	  interfaces, support overriding methods of interfaces with
	  prerequisites

svn path=/trunk/; revision=209