simpleshipsplugin

Added checks for using death chest type plugins or data packs. Assuming the death chest is placed at the location of the player at deat, the re-assembly logic now looks if there is a container at the location that the root block would be placed and if that is the case, the root block is not restored and the container is left untouched. This means that after retrieving the contents of the death chest there will be a missing block in the vessel that will need to be replaced.

Added checks to restrict what blocks the helm itself can be placed on.