Rename Perception -> Helpers

docs/perception.rst → docs/helpers.rst

-Perception
-==========
+Helpers
+=======
 
 There are several classes related to processing information about the game
 state and the input from Starcraft. All these classes are taken more or less

docs/index.rst

@@ -20,7 +20,7 @@ Table of contents
    :maxdepth: 3
 
    gettingstarted
-   perception
+   helpers
    idabot
    unit
    types