Filter out warnings

Bravado spits out irrelevant warnings that we can't fix without
handicapping our spec -- it requires a PR to Bravado

Author: Chris Brown

rasterfoundry/__init__.py

@@ -1,6 +1,15 @@
 # Flag to indicate whether notebook support is available
+import os
+import warnings
+
 try:
     import ipyleaflet  # NOQA
     NOTEBOOK_SUPPORT = True
 except ImportError:
     NOTEBOOK_SUPPORT = False
+
+# Bravado spits out useless warnings by default, this is to silence them
+SHOW_WARNINGS = os.getenv("SHOW_WARNINGS_RF", False)
+
+if not SHOW_WARNINGS:
+    warnings.simplefilter("ignore")