Merge https://github.com/erictheise/WhirlyGlobe into gh-pages
Screen Label tutorial done.
Screen marker tutorial.
Spheres and marker selection tutorials.
Removed empty tutorial.
Merge https://github.com/erictheise/WhirlyGlobe into gh-pages
Messing with link colors.  Added icons to reference section.
New web site
Changed the site baseurl back
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages