Update app UI (colors and rounded corners)

Screenshots:
[iOS Basic Connect](http://erc.bz/mnMz.png)
[iOS Advanced Connect](http://erc.bz/wmCU.png)
[iOS App List](http://erc.bz/Xiw4.png)
[Android 4.4 Basic Connect](http://erc.bz/bU0k.png)
[Android 4.4 Advanced Connect](http://erc.bz/vo7d.png)
[Android 4.4 App List](http://erc.bz/pE8b.png)

I updated the colors, flattened the ui and made the tabs a little taller as they are difficult to tap sometimes (I found myself dismissing the dialog a lot).

Btw, I believe Joshua Ogle is updating the Android icon again to not be so small.