OpenGL ES 3.0 support
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Merge pull request #173 from johankool/develop

Header location fix
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
wms improvements
* Made it working with EPSG:3857 as well
* Use uppercase WMS parameter names bbox -> BBOX
* Make sure returned data is an image. WMS can return error as XML and still used HTTP Status 200 OK
Use text field specified in style sheet
Merge pull request #176 from trailbehind/bugfix/mapnix-text-symbolizer-field

Use text field specified in Mapnik style sheets for text symbolizers
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
EAC/ETC2 tiles almost working.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
move WMS coordinate stuff inside tile source
Merge pull request #174 from halset/wms

wms improvements
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Wasn't pulling in DDXML categories, which broke WMS.  ETC2 changes.
ETC2 working
Updated path to KissXML.  Needed a few functions.
Merged ETC2 changes
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
Fixed bad path.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop