Merge pull request #89 from ChrisGrant/master

Fix for the tests.
Removed the horrible hack to make the uinavigation bar update when the theme changed. This wasn't working properly anyway, and now I've found a way to directly access the title label itself, and can manually update it using that.
Fixed a bug with the navigation bar where the bar button items did not update when the theme changed. This fix works for the back bar button item too.
Merge pull request #90 from ChrisGrant/bugs

Fixed Nav Bar Title.
The shadows now use the actual path for the shape they are rendering a shadow for, rather than just assuming they know that it will be a rectangle with a certain corner radius.
Merge pull request #92 from ChrisGrant/bugs

Fixed a bug with the navigation bar
Merge pull request #95 from ChrisGrant/shadows

Shadows path fix
Fix for #96. Adding submodule instructions into the readme.md file.
Merge pull request #97 from ChrisGrant/smallEnhancements

Fix for #96. Adding submodule instructions into the readme.md file.