update leaflet to 0.7
update minimap control + Leaflet.Sync
[typo] Provider should be `MapBox` instead of `Mapbox`.
Merge pull request #74 from leaflet-extras/leaflet-0.7

Update Leaflet + minimap control + Leaflet.Sync
Merge pull request #75 from missinglink/master

[typo] Provider should be `MapBox` instead of `Mapbox`.
Add OpenMapSurfer.AdminBounds, display overlayish stuff as overlay in preview
jshinting
Merge pull request #76 from leaflet-extras/overlays

OpenMapSurfer.AdminBounds, move overlayish to overlays in preview
bump version after merging #76
Merge branch 'master' of github.com:leaflet-extras/leaflet-providers into gh-pages