Some fixes

Among other changes, I moved `Controller_Template` from `codebench` module to `gleez` module.
This is due to the fact that we have:
+ `Controller_Install_Install` extends `Controller_Template`
+ `Controller_Codebench` extends `Controller_Template`
+ `Kohana_Controller_Userguide` extends `Controller_Template`

but we have only one `Controller_Template`, see 3c1216e