Schemas, cleanup, grapple pull icon

[MatthewMarinets]

Results of some aimless tinkering this evening:

• Updated the HERC Grapple pull icon (see below)
• Some cleanups to RequirementNodeData, BehaviorData, UnitData to get the editor to stop spitting warnings to the console
  • RequirementNodeData no longer uses the SCBW ?token macro thing for some upgrades. It was only used in like 4 places and for one line so I don't really see the point of complicating things like that, and it doesn't play nice with schemas
  • UnitData no longer tries to apply the non-existent stone zealot icons to Fenix's unit/hero icons
  • BehaviorData no longer references the removed
• Added .xsd schemas to validate RequirementData and RequirementNodeData xml files (edit: and UpgradeData)
• Some cleanup in UpgradeData:
  • Race tag values updated to match what the editor recognizes ("Terr" and "Prot" instead of "Terran" and "Protoss")

New Icon

Schema validation

Catches things like duplicate item IDs, incorrect types, incorrect tags. Requirement and RequirementNode data is pretty simple so it was fun to tinker with, but I doubt I'll do something like this for unit/actor data or anything too complex.

Editor cleanup of race field

Old ("Protoss"):

New ("Prot"):