Layer/workspace Effect Presets and backup instance support

Added support for setting and clearing Effect Presets, on both layers and the workspace. Closes bitfocus/companion-module-pvp#9.
Added support for configuring a backup PVP instance and syncing all actions to both installations. This is extremely helpful with large shows when two PVP installations must always be in sync, without the overhead of maintaining two PVP instances and sets of actions in Companion.
Updated HELP,md to describe the new functionality.
Better error logging.
Bumped version to 1.0.4.

bitfocus / companion-module-renewedvision-pvp