rename amiga_gfx to easygfx

docs/source/libraries.rst

@@ -526,7 +526,7 @@ modules. Import them the same way as any other library::
 ``copper``
     Copper list builder and manager.
 
-``amiga_gfx``
+``easygfx``
     Friendly OS graphics wrapper in the style of the ``gfx_*`` pixel modules:
     per-call pen, client-relative coordinates, no structs or tag lists to manage.
     ``fullscreen()`` opens a custom screen with a backdrop window (an empty title