Fixes #168. Let PostSettingsSelectionViewController follow WPStyle guide...

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Configure the style for the view and tableview. (#168)

Before:

![screen shot 2013-11-08 at 4 04 20 pm](https://f.cloud.github.com/assets/1435271/1504625/d58a8e36-48c1-11e3-980d-b167a8f39cd4.png)


After:

![screen shot 2013-11-08 at 4 03 50 pm](https://f.cloud.github.com/assets/1435271/1504631/dcc4f7b8-48c1-11e3-90d1-6f4a5a442546.png)