Namespace mapping with includes

[Falco20019]

When including files with only types and no elements, the namespaces won't get mapped properly. This is due to the fact, that in Generator.BuildModel(), the GlobalElements get processed before the GlobalTypes. I swapped the order to get it working and had no problems using it.

Before, all included types got included into the namespace of the includer. Therefore, I ended with multiple copies of the same type, distributed between different namespaces.

[mganss]

Thanks for reporting this!