Adding a quick and dirty page to view all layers and show the js to create it as a single TileLayer
distinguish between baselayers/overlays
Add an explanation control
 Cleanup + slight amending of text + auto-fit layer control in viewport
Merge branch 'master' of github.com:leaflet-extras/leaflet-providers into preview-page
Display baselayer + all overlay(s) currently in view
Hack in layer name
Fix display of two baselayers in code field.
Move into directory and fix relative links
Merge pull request #47 from leaflet-extras/preview-page

Preview page to fix #23