Bug 560250 - Fully parse included modules

Bug 560250 - Fully parse included modules

For some things, like computing structure offsets to put into the typelib
we need more than just the aliases from included modules. Do a completel
parse of included modules and store in module->included_modules.

Also add g_ir_find_node() to find node information from within the
active set of modules and their includes.

svn path=/trunk/; revision=874