adds client support for scrolling to item/section in UICollectionViews

## Motivation

https://github.com/calabash/calabash-ios-server/pull/31

calabash has great support for scroll to rows in UITableViews.

calabash should support scrolling to items on UICollectionViews.

## Notes

* bumped version to 0.9.167.pre2

## Testing

* [briar 0.1.3](https://github.com/jmoody/briar/tree/0.1.3)
* [briar-ios-example 1.2.2](https://github.com/jmoody/briar-ios-example/tree/1.2.2)

### Briar

* tags 
    - @collection_view
    
* ruby versions 
   - [x] ruby 2.0
   - [x] ruby 1.9
   - [x] ruby 1.8 
    
#### `NO_LAUNCH=1` ==> Manually Launching ==> UIA _not_ available

- [x] iPhone 4S iOS 6 
- [ ] iPad 1 iOS 5.1.1 <== collection views are not supported
- [x] iPhone Simulator iOS 6.1 
- [x] iPad Simulator iOS 6.1 

####  `NO_LAUNCH=0` ==> Launching with Instruments ==> UIA available

- [x] iPhone 4S iOS 6 
- [x] iPhone 5C iOS 7.0.2
- [x] iPad 4 iOS 7.0.3 
- [ ] iPhone Simulator iOS 7 
- [ ] iPad Simulator iOS 7

#### `NO_LAUNCH=0` ==> Launching with Sim Launcher ==> UIA _not_ available

- [ ] iPhone Simulator iOS 6.1
- [ ] iPad Simulator iOS 6.1

#### XTC

```
Apple iPad 2 (6.1.3)
Apple iPad 4th Gen (7.0.4)
Apple iPad Mini Retina (7.0.4)
Apple iPhone 4S (6.1.3)
Apple iPhone 4S (7.0.4)
Apple iPhone 5C (7.0.4)
Apple iPhone 5 (7.0.4)
```