Merge pull request #339 from jhgandhi/master

Modified WFS MIME checks to allow for a subtype or optional parameter
OverlayDecorator: add overlay graph bounds clipping; update overlayviewer to show it
Merge branch 'master' of github.com:gwaldron/osgearth
Made direct bing driver using URI instead of readImageFile

Added some commented out profiling code to URI.
Merge branch 'master' of https://github.com/gwaldron/osgearth