Add Gemfile and Travis config. We'll need to rework the integration spec to not actually build (with xcodebuild).

You know I ❤ you, @MacRuby, we've had a good run. But this ride has come to an end, I declare this repo MRI 1.8.7 and 1.9.3 compatible.

xcodeproj gem.

need downloading or copying).

the right ARCHS. Closes #118 (new feature).

ARCHs on iOS or not.

We can probably also use this new platform object in the future to refactor out platform-specific
logic.

List command

fixed bug of directory cleaning.

prevents multiple times to clean the root directory of symlink headers.

Add .xib support.

Thanks to @alloy

Just a minor tweak :)