Added include of glext.h for Xcode 6.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2351 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Removed No Course warning in terrain profiler.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2352 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added heading, ground speed, gps accuracy and distance to destination to data bar. Modified terrain profiler to show nautical miles rather than statute miles.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2353 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Updated World Wind iOS README. Added a comment to World Wind iOS' MakeAPIDocs shell script.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2354 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Show speed in nautical miles. App update.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2355 822214bb-dcf7-4c8d-a767-17ae0fb20d88