Adds the Viridis, Magma, Plasma and Inferno uniform color ramps
created by Stéfan van der Walt and Nathaniel Smith
See https://bids.github.io/colormap/ for more details
Note that I've thinned out the stops here, and only kept
every 5th stop from the original ramps
- Adds a python script, and the resulting default .db file
- Cannot SAVE new symbols into the DB still
Added the Grouping of symbols in Style Manager
- Can read groups from the DB and load them
- Limited to read-only operations