replace Invokable interface by DelegateType, MethodType, and SignalType

replace Invokable interface by DelegateType, MethodType, and SignalType

2007-12-14  Juerg Billeter  <j@bitron.ch>

	* vala/Makefile.am, vala/valadatatype.vala, vala/valadelegatetype.vala,
	  vala/valafield.vala, vala/valaformalparameter.vala,
	  vala/valainterfacewriter.vala, vala/valainvokable.vala,
	  vala/valamemorymanager.vala, vala/valamethod.vala,
	  vala/valamethodtype.vala, vala/valasemanticanalyzer.vala,
	  vala/valasignal.vala, vala/valasignaltype.vala,
	  vala/valasymbolresolver.vala, vala/valavariabledeclarator.vala,
	  gobject/valaccodegenerator.vala,
	  gobject/valaccodegeneratorinvocationexpression.vala: replace Invokable
	  interface by DelegateType, MethodType, and SignalType classes

svn path=/trunk/; revision=768