Cleanup, removal of unmaintained code (#836)

* add dtype to Box

* remove board_game, debugging, safety, parameter_tuning environments

* massive set of breaking changes
- remove python logging module
- _step, _reset, _seed, _close => non underscored method
- remove benchmark and scoring folder

* Improve render("human"), now resizable, closable window.

* get rid of default step and reset in wrappers, so it doesn’t silently fail for people with underscore methods

* CubeCrash unit test environment

* followup fixes

* MemorizeDigits unit test envrionment

* refactored spaces a bit
fixed indentation
disabled test_env_semantics

* fix unit tests

* fixes

* CubeCrash, MemorizeDigits tested

* gym backwards compatibility patch

* gym backwards compatibility, followup fixes

* changelist, add spaces to main namespaces

* undo_logger_setup for backwards compat

* remove configuration.py

gym/spaces/discrete.py

@@ -1,9 +1,7 @@
 import numpy as np
+from gym import Space, spaces
 
-import gym, time
-from gym.spaces import prng
-
-class Discrete(gym.Space):
+class Discrete(Space):
     """
     {0,1,...,n-1}
 
@@ -12,8 +10,9 @@ class Discrete(gym.Space):
     """
     def __init__(self, n):
         self.n = n
+        Space.__init__(self, (), np.int64)
     def sample(self):
-        return prng.np_random.randint(self.n)
+        return spaces.np_random.randint(self.n)
     def contains(self, x):
         if isinstance(x, int):
             as_int = x
@@ -22,10 +21,6 @@ class Discrete(gym.Space):
         else:
             return False
         return as_int >= 0 and as_int < self.n
-
-    @property
-    def shape(self):
-        return (self.n,)
     def __repr__(self):
         return "Discrete(%d)" % self.n
     def __eq__(self, other):