Summary:
These are default settings now.
I saw my Xcode be configured indent=4.

![2015-03-30 12 16 11 pm](https://cloud.githubusercontent.com/assets/39830/6889697/98f8b930-d6d6-11e4-81c8-d2146855d127.png)

Closes https://github.com/facebook/react-native/pull/472
Github Author: laiso <laiso@lai.so>

Test Plan: Imported from GitHub, without a `Test Plan:` line.