add ClassType and InterfaceType classes, let ArrayType derive from

add ClassType and InterfaceType classes, let ArrayType derive from

2007-12-15  Juerg Billeter  <j@bitron.ch>

	* vala/Makefile.am, vala/valaarraytype.vala, vala/valaclass.vala,
	  vala/valaclasstype.vala, vala/valainterface.vala,
	  vala/valainterfacetype.vala, vala/valareferencetype.vala,
	  vala/valasemanticanalyzer.vala, vala/valasignal.vala,
	  gobject/valaccodegenerator.vala,
	  gobject/valaccodegeneratormemberaccess.vala,
	  gobject/valaccodegeneratormethod.vala,
	  gobject/valadbusbindingprovider.vala: add ClassType and InterfaceType
	  classes, let ArrayType derive from ReferenceType, mark ReferenceType
	  as abstract

svn path=/trunk/; revision=773