Added support for preferredStatusBarStyle

Added it in both via app.json and options. Forwarding properly as well.
Never worked as it should in the past, now does.

Some bonus tests and tests of the new feature.
Merge branch 'master' into statusbar
Changed the initialization order

The status bar styles didn't work in drawer so I changed the order in which things are created.
Figured out that iOS 7 and 8 works different and accounted for that.
Merge pull request #68 from reachlocal/statusbar

Added support for preferredStatusBarStyle