- potential NRE fix for splitting grids

- NRE fix

- Multigrid support added! The shields extends over all types of connections (rotors, pistons, connectors) now. It new and experimental, so please report any bugs ;)

- Nullshield notification fixed

- The shields now go into stand-by when fully charged, draw very little power and make no noise! They will automatically activate when the shield starts taking damage again
- Added an icon for the shield regeneration item that the shield processes that makes it not look like gravel
- The BlockGrinding option now works again and is false by default, so you can grind shielded grids.
- Added several new config options for shield resistances to certain damage types (might reset your config file, not sure, so watch out).
- Thrusters don't damage shields for now. Maybe that fixes that moving ships taking shield damage thing that some people experienced

- Workaround reverted. Upgrade modules draw power again.