QQ: refactor and minror bug fix
QQ: refactor and minror bug fix

- move all info-fetching methods to cronJobs
- refactor array-like object cast in `getBuddyGroupInfo`
- unify `getNameInXxx` methods
- [maybe buggy] do not handle msg sent by self
- fix typo: handel -> handle

Rocket1184/qq-bot-rebown