Added base depth to ExtrudedPolygon.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1857 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Repaired potential integer overflow in LevelSet.getTileNumber(). See WWJ-451.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1862 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added a program and config files to download the TAIGA imagery and elevations to pre-cache.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1865 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified the WWJ shapefile reader to include the field name and field type in warning messages generated during field parsing.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1867 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Repaired an issue where surface shapes containing a pole draw an incorrect outline segment. See WWJ-452.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1869 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Updated the WWJ IDEA project's language level to JDK 1.7.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@1870 822214bb-dcf7-4c8d-a767-17ae0fb20d88