Dublin Features: * Add list of day names and `day_name` function to French Republican converter * Add multiple conversion methods to the French Republican calendar * Add Dublin day count and Julian day count converters * Add month names to Bahai and Hebrew calendars. Other changes: * Clarify that weekdays run Monday=0 to Sunday=6 (#1) * Change Julian converter to use astronomical notation (0 = 1 BCE, -1 = 1 BCE) * Expanded tests