Guide-zh-CN/start-installation.md typo fixed.
Guide-zh-CN/intro-yii.md Spaces, punctuation and line breaks adjusted; A few words modified.
Guide-zh-cn/start-workflow Adjust a few words in order to follow the style of previous sections translation.
Merge pull request #8 from AbrahamGreyson/master

Adjust the "getting started" tutorial.
Translate behaviors [skip ci]
Merge remote-tracking branch 'upstream/master' into transalting
Update intro-upgrade-from-v1.md

在线编辑,同步分支
Guide-zh-CN getting started part adjusted words.
Adjust content [skip ci]
translating behaviors, polished translations of several terms
Guide-zh-CN/concept-autoloading.md proofread.
Merge pull request #12 from AbrahamGreyson/master

Guide-zh-CN/concept-autoloading.md proofread.
translated behaviors
Guide-zh-CN/concept-components.md proofread.Adjust line breaking; modified some words may cause confusing or distracting such as '屌，屌爆了，俩货，高大上，呀呀，妥妥的'.
Merge pull request #13 from AbrahamGreyson/master

Guide-zh-CN/concept-components.md proofread.Adjust line breaking; modifi...
Typo fixed. [skip ci]
First proofread. [skip ci]
Merge pull request #14 from AbrahamGreyson/master

proofread.
IdentityInterface::findIdentity should return active users

```
interface IdentityInterface
{
    /**
     * Finds an identity by the given ID.
     * @param string|integer $id the ID to be looked for
     * @return IdentityInterface the identity object that matches the given ID.
     * Null should be returned if such an identity cannot be found
     * or the identity is not in an active state (disabled, deleted, etc.)
     */
    public static function findIdentity($id);
```
Merge pull request #4216 from SDKiller/patch-3

IdentityInterface::findIdentity should return active users