Release 0.7.0

@Raizlabs/maintainers-ios 
Staging branch for 0.7.0 release. Please try this in any projects currently under development to verify stability.

### Changes

- Full documentation
- Fix for case when a fetched list move notification results in an object no longer passing filter predicate (e.g. if it was updated and changed position based on the fetch's own sort).
- Remove all objects from array list automatically calls `beginUpdates` and `endUpdates`
- Fix empty sections not removed from filtered list (thanks @joe-goullaud)
- Collection list property on data sources may be changed dynamically (thanks @joe-goullaud)
- Data sources can be initialized with header/index options to reduce `reloadData` calls
- Minor refactoring
- Travis CI for build validity
- Update demo and tests for Xcode 5
- iOS 6+ only (no more support for 5)

### Tasks

- [ ] Code review
- [ ] Tag 0.7.0
- [ ] Update/push podspec