Merge pull request #1316 from yohanboniface/gh-pages

Suggestion to add Leaflet.EditInOSM in plugins list
add CloudMade and CartoDB to users on the frontpage
fix minor error in layers control tutorial, close #932
Bump leaflet links to 0.5

Just updating the leaflet links -- css, js -- to point to 0.5 instead of 0.4.
Merge pull request #1339 from phillipadsmith/patch-1

Bump leaflet links to 0.5
Add getWest/South/East/North to reference