use long long rather then int for storing game logic properties.

There were also some problems with int to python conversion
- assigning a PyLong to a KX_GameObject from python would raise an error
- PyLong were coerced into floats when used with internal CValue arithmetic

Changes...
- PyLong is converted into CIntValue for coercing and assigning from python
- CValue's generic GetNumber() function returns a double rather then a float.
- Print an error when a PyType cant be coerced into a CValue

Tested with python, expressions and property sensor.

source/gameengine/GameLogic/SCA_ExpressionController.cpp

@@ -109,7 +109,7 @@ void SCA_ExpressionController::Trigger(SCA_LogicManager* logicmgr)
 				printf(value->GetText());
 			} else
 			{
-				float num = value->GetNumber();
+				float num = (float)value->GetNumber();
 				expressionresult = !MT_fuzzyZero(num);
 			}
 			value->Release();