Including first round of offline map capability...including a new Utility class.
Added support for internal polygons.
Fixing overlays on sub-region view for iOS iphone.
Adding offline subregion support to iPad offline and iPhone query map views.
New vector data to support offline maps.  Based on Natural Earth vector data (50m simplified to make more performant on mobile devices).  Supporting changes to software.
Removing dead code.
Merge pull request #8 from travisbaumgart/develop_issue_3

Merge offline map layer