Minor: added comments about 0.5 offset and pitch inversion to changelog.

changelog.txt

@@ -6,14 +6,17 @@ New: Maze generator can now take care of quitting mission when agent reaches goa
 New: AgentQuitFromReachingCommandQuota (issue #109).
 Rewards are now only sent when triggered (issue #120).
 Multi-dimensional rewards are now possible, using a 'dimension' parameter on each RewardProducer.
+Pitch command had positive as up, which was inconsistent with Minecraft and Placement section.
 
 0.13.0 (2016-07-01)
 -------------------
 New: tp x y z command (issue #112).
 Fix: Hotbar commands moved from ContinuousMovementCommands to InventoryCommands.
 Fix: Client quit producers are now queried between executing commands, in cases where commands get clustered.
 New: Test for AgentQuitFromReachingPosition.
-Some MissionSpec calls now take float coordinates to match XML (issue #107). MissionSpec::endAt now takes tolerance parameter.
+Some MissionSpec calls now take float coordinates to match XML (issue #107). If you want to start in the middle of a block,
+  make sure that the x and z coordinates end in 0.5.
+MissionSpec::endAt now takes tolerance parameter.
 peekWorldState and getWorldState now return WorldState instances rather than smart pointers (issue #124).
 New: API call MissionSpec::setViewpoint to change the camera viewpoint.
 Fix: ALE_HAC.py was broken (issue #114).