Updated VGL
Fixed GL plane feature not respecting GCS
Removed old deprecated _delete API
Fixed warnings and possible errors
Implemented transform coordiantes for other projections using proj4
Added test for coordinate conversions
Fixed a bug where coordinates in object form were invalid
Fixed conversion with geo.latlng instance
Added some more test conditions
Fixed warnings
Adding test for proj4 conversion
Fixed proj4 test
Handled the case of array with 2 or 3 components
Merge pull request #177 from OpenGeoscience/fix_gl_plane_feature

Fix gl plane feature