Added title, for hover text, to create-geojson and geolocation buttons
Add parameter to addLayer function to set element's title for hover text.  Implement with Google tile toggle button
Tool tip for projection box.  For https://github.com/aaronr/bboxfinder.com/issues/19
Merge branch 'gh-pages' of https://github.com/aaronr/bboxfinder.com into gh-pages
Merge branch 'gh-pages' of https://github.com/aaronr/bboxfinder.com into gh-pages