Station data for map - Githubissues

Added station data display on the map
Improved caching for station data display
Dynamically show applicable variables for stations
Station name mapping to make the displayed name more readable
Changed unit display to single format across stations
Added ignore list for stations with erroneous values
Wind direction shown using more easily understood arrow graphic (final graphic may need to be changed for future)

cioos-atlantic / atlantic-hurricane-dashboard