WebRave Raster symbolization method for categorical

[MattReimer]

On friday we did a demo and it was discovered that categorical rasters don't have an export button in QGIS. When you dig through and finally export it you get a CLR file instead of the webramp we've designed the process around.

This needs to be solved and we need a method for symbolizing all kinds of rasters in WebRAVe

Also related to:

• https://github.com/Riverscapes/rs-web-monorepo/issues/138
• Symbology for Vegetation Layers in RSContext #265

[MattReimer]

We now have fixes for both the discrete and the exact raster types.

INTERPOLATION:EXACT is what we need to use for categorical rasters and you can see this in play here:

https://github.com/Riverscapes/RiverscapesXML/blob/master/Symbology/web/Shared/Existing_Veg_EVT_Riparian.txt