several bugs in python TCompactProtocol

The python TCompactProtocol implementation has a few bugs:

• In the writeBool method:
  • the code has a typo in the spelling of AssertionError
  • code fails when accessing a nonexistent types[] dict to encode the boolean
• The TType.STOP token was missing from the CTYPES dict and CompactType class, so empty sequence types failed to decode with an error in __getTType looking for TTYPES[0] and not finding it

The SerializationTest.py code has a few small issues:

• the code didn't compare the full serialization/deserialization for the versioningV1/V2 structs, only a couple fields
• the VersioningTestV2 object has a set() field that is initialized to a list, not a set
• the Compact Protocol code for handling field ID deltas >= 15 wasn't exercised

I have a patch to fix the problem with TCompactProtocol encoding Booleans, and updated the test cases to specifically test Booleans (using ThriftTest.ttypes's Bools).

I extended the SerializationTest.py code to include testing of the DebugProtoTest,ttype's CompactProtoTestStruct, manually setting its values (where possible) to the values from the const COMPACT_TEST in DebugProtoTest.thrift. This uncovered the bug in handling decoding of empty Map types, which is the bug caused by the missing TType.STOP token in the local CTYPES[] dict().