sub menus didn't get checked for being active.

Based off the method in ```Menu.php``` I've updated ```Nav``` so it will check if sub menus are active or not.
console/Controller support local options per action
console/Controller show help for local options
#2630: `yii\heplers\Html::url` moved to new `yii\helpers\Url::create`
Added Url::asset
Added Url::rememberReturnUrl
Added Url::canonical
Renamed methods, added Url::getHome
Added Url::createAbsolute, adjusted signiatures
Adjusted changelog
Argument for Url::base is now optional
Update _config.php

fixed application config for unit test
fix buildin php bug https://bugs.php.net/bug.php?id=66606
Adjusted Url helper methods
combine globalOptions() with local options into options($id)

adjust existing Console Controllers and docs
sort options by action in Migration controller
Update data-grid.md

DataColumn doesn't have "name" & "type" fields, and should have fully qualified name if not omitted
changelog
Merge pull request #2686 from sanchezby/master

Corrected sample in data-grid.md
Adjusted URL helper, fixed usage