Put nbextension / serverextension enables in different places

Thanks to @SylvianCorlay from gitter for the help.

Author: yuvipanda

nbresuse/etc/nbextension.json

@@ -0,0 +1,6 @@
+{
+  "load_extensions": {
+     "nbresuse/main": true
+  }
+}
+

nbresuse/etc/nbresuse.json nbresuse/etc/serverextension.jsonnbresuse/etc/nbresuse.json renamed to nbresuse/etc/serverextension.json

@@ -3,9 +3,6 @@
     "nbserver_extensions": {
       "nbresuse": true
     }
-  },
-  "load_extensions": {
-     "nbresuse/static/main": true
   }
 }
 

setup.py

@@ -13,7 +13,8 @@
     ],
     package_data={'nbresuse': ['static/*']},
     data_files=[
-        ('etc/jupyter/jupyter_notebook_config.d', ['nbresuse/etc/nbresuse.json'])
+        ('etc/jupyter/jupyter_notebook_config.d', ['nbresuse/etc/serverextension.json']),
+        ('etc/jupyter/nbconfig/notebook.d', ['nbresuse/etc/nbextension.json'])
     ],
     zip_safe=False,
     include_package_data=True