Updates to the plugin documentation.
Adjust tank supply cost. fixes #156.
Small unicode related fix.
Consolidate and improve readers layer.
Bump version to 0.6.4.
Fix up event names and hierarchy.

* PacketEvent is now ProgressEvent.
* SetToHotkeyEvent is now SetControlGroupEvent.
* AddToHotkeyEvent is now AddToControlGroupEvent.
* GetFromHotkeyEvent is now GetControlGroupEvent.
* PlayerAbilityEvent is no longer part of the event hierarchy.
* event.name is no longer a class property; it can only be accessed from an event instance.
Flesh out the ping class.
Misc. documentation improvements.
First pass at replay resume support. refs #91
Remove unused player_names. closes #158.
Merge remote-tracking branch 'upstream/master'