Xuzz/newsyc — pull request #125 by mzheng (2014-05-31 05:14:42+00:00)
Title: Comment collapsing

These changes:
1) Enable ARC and use modern Objective-C
2) Allow comment collapsing and expanding.

![2014-05-30 22 11 49](https://cloud.githubusercontent.com/assets/536584/3138301/64188aee-e882-11e3-9e56-616d3c2fc244.png)