Archive graphics

[CommonClimate]

addresses #512 and #590 with graphical conventions that are inspired by what @DaveEdge1 sent, but use prettier colors and more consistent shapes (e.g. corals and sclerosponges have the same shape but different colors).

var shapePal ={"Borehole":"square","MolluskShell":"triangle","GlacierIce":"snowflake","GroundIce":"snowflake","Coral":"triangle-down","FluvialSediment":"circle","LakeSediment":"circle","MarineSediment":"circle","Speleothem":"square","Midden":"diamond","Peat":"triangle-down","Sclerosponge":"triangle","Shoreline":"diamond","Wood":"triangle","TerrestrialSediment":"circle"}