Malmo

------------------
Add: WorldDecorators can now throw to cleanly abort missions.
Fix: Mod error message lists weren't getting reset between missions.
Add: New python example for DefaultWorldGenerator, timestamps etc.
Fix: MissionSpec::useDiscreteActions() was broken.
Fix: Timestamps weren't accessible in Python and Lua.
Fix: Player now no longer remains on fire from the end of a previous mission.
Fix: Player placement yaw and pitch were being ignored.
Add: New python example for tabular Q learning.
Add: ClassroomDecorator, providing random sampling from a parameterized mission space.

------------------
Fix: When running multiple missions, video/PNGs would only be saved in the first one.

------------------
Fix: Attempting to run without saving mission file (empty MissionRecordSpec) would cause crash.
Fix: Torch support was missing.
Add: Debian 7 support now available.

------------------
Fix: Reuses TCP connections to avoid leaving too many ports in TIME_WAIT.

------------------
Fix: getTorchTensorFromPixels now takes an allocated tensor, avoids memory leak.

------------------
Fix: Final reward now sent in MissionEnded message to guarantee arrival.