Additional super res products

[Codex98]

First off I'm enjoying the program and I'm happy to see that work continues. Can't wait to see what's coming. I did have a couple of requests of my own though.

1. Storm relative velocity - the current resolution on Supercell WX is very coarse. It also doesn't update as often as the other level 3 products. Adding super-res, or the classic resolution like on GRLevel3 would be nice.
2. Correlation coefficient - Sometimes debris signatures don't pop out quite as well without super res CC. They do show up, just not as clearly.

This is the current storm relative velocity I was referring to.

[dpaulat]

This should come with the addition of additional data sources (#17), but it will depend on which sources have an archive of which product. Some super res level 3 products may require a subscription like Allison House (currently not supported). I do want to keep this open to make sure I add support for specific products.