remove nbgrader b/c old dependencies

binder/environment.yml

-name: improc_beginner_corr
+name: improc_beginner
 channels:
   - conda-forge
 dependencies:
@@ -12,7 +12,8 @@ dependencies:
   - pandas
   - jupyter_contrib_nbextensions
   - ipympl
-  - nbgrader
   - pip:
     - requests
-    - lckr-jupyterlab-variableinspector
\ No newline at end of file
+    - lckr-jupyterlab-variableinspector
+    - microfilm
+    - napari[all]
\ No newline at end of file