add floor-jump-link like '#1'
try to fix a bug: messages when create a topic
let 'floor-jump-link' work
str.isdigit() -> re
remove '#replyN' from the link of topic title
update css file
change page for 'floor_jump_link' (still not work)
'floor-jump-link' can work now
用js代替py实现楼层跳转链接的页数计算
site.coffee: the real replies_per_page
remove the extra import from topic.py
Merge pull request #40 from oyiadin/master

improve and fix