Sc2reader

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* Fixes several game event parsing issues for older replays.
* Properly maps ability ids for armory vehicle & ship armor upgrades.
* Uses the US depot for SEA battle.net depot dependencies.
* ``PlayerStatEvent.food_used`` and ``food_made`` are now properly divided by 4096
* ``AbilityEvent.flags`` are now processed into a dictionary mapping flag name to True/False (``AbilityEvent.flag``)
* Fixed error preventing UnitOwnerChangeEvents from being processed
* Fixed the toJSON plugin and adds new fields
* Fixed error preventing parsing of MapHeader (s2mh) files
* APMTracker now properly calculates average APM to the last second played by each player instead of using the number of replay minutes in the denominator.

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* Support for all replays (arcade replays now parse!) from all versions
* Support for the new replay.tracker.events added in 2.0.8
* Units now have birth frame, death frame, and owner information
* New events for (roughly) tracking unit positions
* New events for tracking player resource stockpiles and collection rates
* More!
* Much more comprehensive documentation.
* New unit model
* SiegeTank and SiegeTankSieged (and others with different forms) are no longer separate units.
* Units that can transform maintain a full type history.
* Units are correctly and uniquely identified by unit_id alone.
* Updated unit meta data:
* Mineral Cost
* Vespene Cost
* Supply Cost
* Flags for is_worker, is_army, is_building
* Added ability meta data:
* is_build flag marking abilities that create units
* build_unit indicating the unit type that is built
* build_time indicating the build time for the ability