arithmetic module
在README中添加requirements.txt和unit test的说明
pep8
Merge branch 'root-repo'
handle long reply message
solve timout calculation
add unittest
more arithmetic matching pattern
add timeout utility script
pep8
solves keepalive problem by session
add changelog following controller convention
Merge pull request #27 from hupili/simsimi

Simsimi using requests.Session
change backend to sympy; dependency update; case update
Allow advanced operators

   * Matching expression allow 'a-z', 'A-Z' and ','
   * Case fixed according to new matching
remove old comments
conversion between '^' and '**'
Merge pull request #26 from hupili/master

计算鸡 plugin
启用新插件--计算
如果精确值太长则转换成不精确的小数