Move screenshots to another branch

-<a href="https://jamesblasco.github.io/modal_bottom_sheet/#/"><img src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/preview.png?raw=true"></a>
+<a href="https://jamesblasco.github.io/modal_bottom_sheet/#/"><img src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/preview.png?raw=true"></a>
 
 # Flutter Modal Bottom Sheet
 
@@ -9,7 +9,7 @@ Create awesome and powerful modal bottom sheets.
 
 |  Cupertino Modal |  Multiple Modals |  Material Modal | Bar Modal  |  Create your own |
 |---|---|---|---|---|
-|<img height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/cupertino_shared_view.gif?raw=true">| <img  height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/modal_inside_modal.gif?raw=true">| <img   height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/material_fit.png?raw=true">|<img   height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/bar_modal.png?raw=true">| <img height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/master/screenshots/avatar_modal.png?raw=true">|
+|<img height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/cupertino_shared_view.gif?raw=true">| <img  height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/modal_inside_modal.gif?raw=true">| <img   height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/material_fit.png?raw=true">|<img   height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/bar_modal.png?raw=true">| <img height="300" src="https://github.com/jamesblasco/modal_bottom_sheet/blob/screenshots/avatar_modal.png?raw=true">|
 
 ## Try it