Changes to hashable dict (aimacode#482)

* Adds hashable dict type

* Implemented permutation decoder

* added test for permutation decode

* Optimized permutationdecoder

* relaxed tests

* uses isinstance

Author: Chipe1

text.py

@@ -399,7 +399,6 @@ def actions(self, state):
 
     def result(self, state, action):
         new_state = hashabledict(state)  # copy to prevent hash issues
-        assert type(new_state) == hashabledict
         new_state[action[0]] = action[1]
         return new_state
 

utils.py

@@ -579,19 +579,19 @@ def __hash__(self):
         return hash(self.__tuplify__())
 
     def __lt__(self, odict):
-        assert type(odict) is hashabledict
+        assert isinstance(odict, hashabledict)
         return self.__tuplify__() < odict.__tuplify__()
 
     def __gt__(self, odict):
-        assert type(odict) is hashabledict
+        assert isinstance(odict, hashabledict)
         return self.__tuplify__() > odict.__tuplify__()
 
     def __le__(self, odict):
-        assert type(odict) is hashabledict
+        assert isinstance(odict, hashabledict)
         return self.__tuplify__() <= odict.__tuplify__()
 
     def __ge__(self, odict):
-        assert type(odict) is hashabledict
+        assert isinstance(odict, hashabledict)
         return self.__tuplify__() >= odict.__tuplify__()