kealib needs to be installed from conda forge

* gdal, libgdal and kealib will conflict if not all installed from conda forge 
goodness this issue doesn't seem to want to go away but atleast the fix is easy once known.

Author: Leah Wasser

environment.yml

@@ -25,6 +25,7 @@ dependencies:
   - scikit-image
   - gdal
   - libgdal
+  - kealib
   - geocoder
   - geojson