* appdomain.c: Set assembly references public token value when

    * appdomain.c: Set assembly references public token value when
	PublicKeyToken is specified, not the hash_value. Free public token
	values when free assembly name data. Previously the public key
	token was hex decoded, however we are using hex encoded public key
	tokens, so this is not neccasary.
	* assembly.c: Lookup assemblies in the gac if their public token
	value is set. Add function to allow enabling user gac
	lookups. Specify whether or not the assembly was loaded from the
	GAC. Compare full assembly names when checking the cache for
	assemblies (Temporarily disabled see comment in code). Remove
	mscorlib -> corlib mapping cruft. Add trace-loading. When a user
	specifies trace-loader they get extra info to stdout on the
	loading of assemblies.
	* image.h: Add a field for an assembly references public token
	value to MonoAssemblyname. Add a field to MonoAssembly to specifiy
	whether an assembly has been loaded from the GAC.
	* image.c: Remove a corlib -> mscorlib name mapping.
	* loader.h: Add function to enable/disable the user gac.
	* mono-config.c: Check if the usergac is enabled in the config
	file.
	* icall.c: New icall to determine whether or not an assembly has
	been loaded from the GAC. Remove some mscorlib -> corlib mappings.
	* tabldefs.h: Add constant for assemblyref flag that specifies a
	full public key is used instead of a public token.
	* reflection.c: Remove mscorlib -> corlib mappings. Set
	PublicTokenValue instead of hash value. This value is a hex
	string so it does not need to be expanded.

svn path=/trunk/mono/; revision=26012