Updated release number in docs (#369)

docs/source/conf.py

@@ -25,10 +25,10 @@ project = 'ALE'
 copyright = 'Public Domain'
 author = 'USGS, Astrogeology Science Center'
 
-# The short X.Y version
-version = '0.1'
+# The short X.Y.Z version
+version = '0.8.1'
 # The full version, including alpha/beta/rc tags
-release = '0.1.0'
+release = '0.8.1'
 
 
 # -- General configuration ---------------------------------------------------