[vala] (10 commits) ...codegen: Don't emit type_id for enum in non GOBJECT profile

[Rico Tzschichholz <ricotz src gnome org>]

Summary of changes:

  9e9e5b5... glib-2.0: Drop g_object_unref which is part of gobject-2.0 (*)
  c28b35f... tests: Add some minimal test cases to catch insufficient he (*)
  8260ce7... vala: Add Delegate/Method/ObjectTypeSymbol.has_type_paramet (*)
  9c28173... vala: Use DataType.get_type_arguments() (*)
  c263063... codegen: Add type declarations required for generics as nee (*)
  6f5a64b... codegen: Add type declaration for errors and error domains  (*)
  d7da53a... codegen: Add required headers for ctor/dtor of compact clas (*)
  c1bc4ac... codegen: Improve adding of delegate target type declaration (*)
  2ceaa53... codegen: Don't explicitly add glib headers, using symbols w (*)
  f9b139e... codegen: Don't emit type_id for enum in non GOBJECT profile (*)

(*) This commit already existed in another branch; no separate mail sent