Skirmish Update

Relatively newly implemented:

• Class trees with highlighted ranks and XP; allows changing classes. Only 'available' class trees are shown (usually 1 of the 6 possible).
• Skill trees with highlighted learned skills, ability to learn skills.
• Rewritten entity storage; saving and loading really works now, really. Skills, classes, SP/XP, and formations are saved without fail.
• Cut network traffic down to 10% or so.
• More data parsing stuff to enable different game effects/actions/states
• Formations are viewable on the client.
• Local Network server discovery.
• Some particle effects.
• Other stuff too rote to remember.