Modify VMAP extractor to give priority to models in patch MPQs.

This fixes VMAPs/MoveMaps in certain locations (e.g. Blackwing Lair).

VMAPs and MoveMaps should be rebuilt completely to ensure that the correct
model data has been used everywhere.
Merge commit '0ca6592fb51611d228d65ae15f16c191bcb05b2a' into testing