Fixed compilation error introduced by game update.

Slight refactor and fixes for game changes.

* Needs only one of either Remote control or Cockpit on the grid
* Automatically adjusts set speed to accomodate speed mods
* More responsive and accurate thanks to new speed calculation method
* Fixed default set speed that changed in game

Remote control block doesn't need a specific name now.

Added quick setup instructions

Changed thruster search from name to group based.

Fixed incorrect message with no thrusters found.

Added LCD support.
Easy setting of arbitrary gravity threshold.