add satpy to our buildbucket

buildbucket/buildbucket_environment.yaml

@@ -15,4 +15,16 @@ dependencies:
   - scipy
   - setuptools
   - xarray
-  - zarr
\ No newline at end of file
+  - zarr
+  # satpy dependencies:
+  - configobj
+  - pykdtree
+  - pyresample
+  - trollsift
+  - trollimage
+  - shapely
+  - pip:
+    - git+https://github.com/deeplycloudy/lmatools.git@minvaluegrids
+    - git+https://github.com/deeplycloudy/stormdrain.git
+    - git+https://github.com/deeplycloudy/glmtools.git@master
+    - git+https://github.com/pytroll/satpy.git@master
\ No newline at end of file