Adding suppor.  Added a new geojson that has higher resolution 50m ocean data from Natrual Earth.  Now using the same NE data that the iOS app uses.  Slight refactor of  Offline Map class to reuse PolygonOptions generation logic.
Removing old low-rez 50m data.
removed extra import...
Adding a modified geojson file that replaced +-180 and +-90 with +-179.9999 and +-89.9999 respectively.  This gets us around a bug in google maps that'll omit polygons that are on the boundry cases of the earth.
Merge pull request #12 from travisbaumgart/master

Adding in support for MultiPolygons.  Added higher-rez Offline Map