iOS logs for simulator and real device

<strong style="color:#FFFF00">Fixed conflicts with refactoring of ios.js and ios-controller.js</strong>


#### Setting up new features
```sh
./reset.sh --ios --verbose
```

######  Supported log types : logcat, ios
```python
self.driver.log_types
```

######  iOS logs for simulator and devices

```python
self.driver.get_log("ios")
```

<br/>
#### Fixed an issue in grunt configuration
maxBuffer increased to 2000*1024 due to problems with "maxBuffer exceeded" for selendroid building