Add validation custom function

fix issues  #1473, #1502

TplNames renamed TplName ,fix #1229,Remember modify bee tool.

change get sessionID logic from cookie

mem cache put function fixed

https://github.com/astaxie/beego/issues/1259

when a expire duration==0,it means forever
https://github.com/astaxie/beego/issues/1260

reuse compress writer