AXInspectorEnabled needs to be false b/c the inspector panel blocks UINavigationBar button touches

## Motivation

CI tests against the 'masters' toolchain are failing.

See for https://github.com/jmoody/briar-ios-example/pull/29 analysis.

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![2014-08-13_21-08-27](https://cloud.githubusercontent.com/assets/466104/3911320/257cb71e-2320-11e4-8c57-bd409e390d25.png)
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## Notes

Travis CI is flickering when running this gem's rspec.   The failure is do to an unstable simulator env. on Travis CI.