Race-exclusiveness expanded

[Toma400]

System allowing race-exclusive classes is pretty great, but I think this could be expanded to race-exclusive origins or class-exclusive religion (for example, ormath shaman would only be able to be of his ormathic faith). It should be:

• possibly as open as possible (with thought that doing element specific to both race and class (or even anything else?) raises a lot more issues with code, so doing "one thing only for one thing", i.e. origins only dictated by race or class, not both, would be beneficial by not putting too many checkers everywhere)
• work via whitelist and blacklist, since currently it only uses whitelist (it counts races that can go in, but doesn't ban any)

As the more this feature expands, the more complicated it gets, I'd for now only suggest small improvements for it in pre-alpha 3 case, or even passing it to pre-alpha 4 for getting broader perspective and feedback.

[Toma400]

Additional caveat to analyse: if we consider doing those exclusiveness in a way where, for example, ormath will allow for ormathic religion, but ormath shaman would have to have this religion only, we will have probably two iterations over religions? (one will return standard list + ormath, second will return only ormath) This makes it much more complicated to analyse, since there should be some rules deciding which one has priority or how to resolve such conflict.

[Toma400]

This will need fixing issues with lag that is encountered during skill/attribute counting, because this may also affect performance - and even current one should be avoided.