Implemented the %ouroborosmines_opening_<world>_<region>% placeholder, which shows a countdown until the mine opens. The countdown can be customized in the placeholders section of config.yml.
Implemented the %ouroborosmines_name_<world>_<region>% placeholder, which displays a mine's name which can be defined in the region's configuration file. If not defined, the placeholder will fallback to the regions id.
Implemented new time system.
Fixes
Fixed a bug that prevented opening-hours to work correctly if the timezone was set manually.
Fixed a bug that prevented opening-hours from repeating in the give period.