Reverted the change to TextRender glyph caching made for WWJ-308 because it was causing side effects. See that issue for the details. Added System.properties option to enable the behavior that causes arabic text to be rendered correctly.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2387 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added decluttered PointPlacemark label picking. See MDA-72.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2388 822214bb-dcf7-4c8d-a767-17ae0fb20d88