Add CSS Color Module Level 3 Extended Keyword Functions to CBA

[lambdatiger]

This PR references these W3c color keywords:
https://www.w3.org/TR/css-color-3/#svg-color
When merged this pull request will:

• Add a hashmap CBA_common_cssColorNames
• Add a function to convert from color keyword to
  • Decimal RGB
  • HEX color code w/o transparency ("#RRGGBB")
  • Procedural color texture

Feedback Requested:

• Should the cache be in preStart? I know ACE does this, but it's currently just a config lookup that NEEDS to be there
• Do we want the procedural textures to be argb rather than rgb, I know certain times it's useful to have one over the other when texturing things.

[Drofseh]

Can you edit the PR to point to my colour-conversion branch instead of the main branch?

Also QGVAR(cssColorNames) will expande to CBA_common_cssColorNames not CBA_main_cssColorNames

[lambdatiger]

Yeah, thought I'd PR'd this for your colour-conversion branch, sorry about that. I didn't double check the hash name, but that makes sense. The full name doesn't matter in the end.

[lambdatiger]

Apologies about that the post merge errors, it worked/compiled on my side so I don't exactly know how that happened.