DragonTravel

Added:
    - Renamed message "Messages.General.Error.RequireSkyLight" to "Messages.General.Error.RequireSkyLightPlayer" (existing messages.yml should be updated automatically)
    - Added message "Messages.General.Error.RequireSkyLightDestination"

Fixed:
    - Adjusted permissions for home-travel, added "dt.travelhome" (a full list of latest permissions can be found in the wiki)
    - A player trying to travel to a station which does not exist is not charged anymore
    - Hopefully fixed incorrect skylight check (GitHub issue #38)
    - Decreased dismount accuracy for higher "DragonSpeed" settings so dragons get stuck less often and at the same time added a console warning when starting DragonTravel with a "DragonSpeed" setting above 1.5. 

KNOWN BUGS:
    - The problem about players being charged for travels even though they were not started because of the skylight check has not been fixed yet. I will try to include the fix in the next release.