Merge pull request #1 from chinavatar/zwd

add some statistics and modify models
Merge pull request #2 from chinavatar/zwd_tag

Zwd tag
Merge pull request #3 from chinavatar/zwd_tag

modify page head
Merge pull request #4 from chinavatar/zwd_1

Zwd 1
add some admin page
citylist and province list is added.
sql is added.
citylist function is added.
Merge pull request #5 from jerry-sjtu/qiang.wang

citylist function is added.
del and rec books,some styles
city name display
book city info
Merge pull request #7 from chinavatar/zwd_3

Zwd 3
fix some bugs about cityid
add time info
Merge pull request #8 from chinavatar/zwd_4

Zwd 4
home book solid position
Merge pull request #9 from chinavatar/zwd_5

home book solid position
fix some bugs
Merge pull request #10 from chinavatar/zwd_6

fix some bugs