Merge pull request #122 from dezinezync/master

Ignore Carthage folder & minor Umbrella header fixes

Merge pull request #122 from dezinezync/master

Ignore Carthage folder & minor Umbrella header fixes

More bug fixes and performance improvements

Update documentation

Update README

- Add link to 1.2 release

Use ARC

- Fix various memory leaks
- Remove unnecessary code because of ARC
- Update README