add compare_not/not_nil methods for template

Update task tpl 

Add attribute default to the column on create or alter commands. Skip co...

Fixed the status code issue at error handler.

增加session模块中的ledisdb的动态配置

Fix RequestURI nil caused template parse failed

Sometime RequestURI is not set, e.g. running after a front proxy server.

We should always follow the document's directive, to use Request.URL instead of RequestURI.

Refer: http://golang.org/pkg/net/http/#Request

Support default value for controller’s params get

Fix subdomain, add test, space and comment fix

Allow absolute path for filesystem cache

Add all type support for UrlFor’s params

Fix paginator attributes cannot be modified bug

We can only use SetPaginator to create a pagination.

After that, we always need to modify something, like the totalNum, perPageNum.

These change should be seen in the view.

So we should give the view a pointer than a object.

Gives more flexibility by making it an absolute path. A relative path can easily be created by the user.

make Content-Type header more human-readable

beego1.4.2，beego.AppConfig.Strings与老版本代码不兼容问题  

Reword message about reloading packages..

count log file lines

SubDomains function bugfixed

Return the response directly if it's a options PreflightHeader request