add static global function & add seocms example
Merge pull request #82 from matrixik/master

Change: SetRotateMaxDay => SetRotateMaxDays
fix build problem
Merge pull request #83 from shxsun/master

In go version 1.0.3 will call build error
delete session's cookie Expires
add isclose call close many times
add mutex
fix close err
sync quickstart.
Merge pull request #85 from Unknwon/master

sync quickstart.