Replaced Network Containers
Fixed some minor mistakes and fixed up Tangible.h to test.
Fixed up creature.h
Fixes made to support the new network containers. Testing, fixes, and then PR.
Fixed up code to compile with the new network containers. More testing to come.
Network containers fixed up. Skills and XP now functioning. Need to rework what happens when skills are added/removed so that skill mods, abilities, and certifications can be computed.
Merge remote-tracking branch 'pk/network_containers' into develop