[ai-0.36-82] random bots won't buy useless items anymore
[ai-0.36-83] random bot guilds. running sql/ai_playerbot_guild_names.sql on char db and 'rndbot refresh' command are required
Merge branch 'trinity-wotlk-ai' of https://github.com/ike3/mangosbot into ghbb

Conflicts:
	src/plugins/playerbot/strategy/actions/QueryItemUsageAction.cpp
	src/plugins/playerbot/strategy/actions/TradeStatusAction.cpp