Standardize things

[ebetica]

So we run into these issues all the time. There's random things lying around in staticvalues and not really bound in BWAPI, that we might want to access through the units interface. Maybe we should consider forwarding all the right values from BWAPI from their respective locations so users can simple use attributes on a unit?

I'm keeping a list of things that might be necessary here and not correctly implemented:

• maxCD actually is the max ground cd accounting for upgrades, air units have no upgrades so you can technically get this from static values.
• actual top speed is not visible to the client (just unupgraded top speed)
• No max energy
• Angle is unimplemented Add BWAPI's UnitInterface.getAngle() #252
• why is pixel_size_x and y a dynamic value

Additionally, we should make sure all units of measurement are frames and walktiles.