Let FunctionBuilder figure out library module by itself
Keep knowledge of conversion to FFI type for registered types in one place

The FFI type must always be found by calling .to_ffitype on the
registered type class.
Check bounds in GLib::Array#index
Check bounds in GLib::PtrArray#index
Make HashTable#key_type and #value_type attr_readers
Integrate RubyStyle module into GObject::Object
Remove some TODOs
Move GirFFI::Builder::Field to FieldBuilder
Increase refcount for the result of IBaseInfo#container

The result of g_base_info_get_container is actually marked transfer:
none, so needs to have its refcount increased in order to avoid
decreasing it to much later.
Pass only the field info to FieldBuilder
Remove unused InfoExt::IObjectInfo
Create IRegisteredType#find_instance_method

This method replaces WithMethods#instance_method_introspection_data.
Make FieldBuilder responsible for evaluating its definitions
Add integration tests for Regress::TestBoxedD
Improve integration test for Secret::Schema
Add more tests for signal emitting methods in Regress
Clean up test for Regress:TestObj#torture_signature_1
Generate test scaffolding for fields, properties, signals and namespace
Generate specialized test description for private fields
Improve property test context description

Adding some quotes clears things up.