v4.90.R

• Tesla M3 mod board support
• Fixed Leaf heat sink sensor unselectable
• AC current limit code can be disabled by setting current limit to 0
• Eliminate spurious over current warning
• Fixed disabled regen when pot2 is not connected
• Pull up emcystop on Prius hardware
• Vary sign of field weakening controller gain with direction
• Add parameter index to json output
• Disallow negative throtcur