Update README.md

Replace lightbox2 by Magnific-Popup
Add restricted extent for single and link map
Recenter map with right extent when switch full screen state for map and inset (need to be refine)
Change for esri api 3.7
Remove reference to array of map. Now every config file can hold only one map
Insert concept of init extent and full extent
Add custom binding to manage show/hide inset
Add new sample for inset type map
Redo link map because if feature layer are on the map, the mouse-out event didn't work
Add denounce on inset and fullscreen click
Remove restric extent
Simplify extent-change event
Add four inset map types
Add load image when map go to lightbox (if not resize problem when user close lightbox too soon)
Solve multiple extent-change when go to full screen
Merge pull request #19 from jolevesq/mapinset

Mapinset