[CORE] Add support POST data instead of only GET.
[CORE] Add custom init function for site, `fInit`.
[RULE] Add miaobige.com, reported from `https://greasyfork.org/en/forum/discussion/2265`
[RULE] Add `lwxs520.com`
Merge pull request #22 from JixunMoe/master

看里面，加了规则 & 改核心