Added two simple cube tokens

[elmodor]

Fixes/Solves
There were no cube tokens present in the default asset pack. This serves two purposes:

• Some default basic colored tokens (red and green). They can be used as counter, tracker, etc
• As an example template for other cube tokens

The focus is of course more on the first bullet point: To have a marker/tracker without any number on it that can be used universally.

Size measured by some real cardboard cut out tokens.

[drwhut]

Thank you for the PR!

This seems like a good idea, but I've got two points:

• Instead of having different images for each token, it's probably better to have one image for a "white" token, and allow the user to change the colour in-game - you can also add some preset token colours using the config file, see the dice configs as an example!
• Unless you don't mind me being the "author" of the images, you can set the author and license of the images in the config file.

[elmodor]

Done and done!

[drwhut]

Cool, just a couple more things that I've spotted!

• If the image is just pure white, you can massively reduce the size of the image by having it be a 1x1 .bmp image!
• The "A simple token." description is redundant, since it gets overwritten by all of the other descriptions in the file.

[elmodor]

It's not completely pure white. I made the shade a tiny bit different. Would you rather like a pure white one?

Removed the redundant desc

[drwhut]

Ah sorry, I just assumed it was pure white. The original colour is fine! 🙂

[elmodor]

Okay, let me know if there's anything else left to do 😄

[drwhut]

Apart from the simplifying of the image, we could also take the time to add a whole bunch of colours? We could use the dice as an example (and that way, we could get the tokens and dice to match colours?)

[elmodor]

Will do.

Is there any place (in the repo or in the docs) where we could store UV template files?

[elmodor]

White image is 1x1 bmp and added all the colors from the dices.

[drwhut]

Looks good!

[drwhut]

Is there any place (in the repo or in the docs) where we could store UV template files?

There's already UV templates in the docs.

[elmodor]

Turns out many games also need: cubes. Like little cubes:
Little cubes

How would you feel if I extended this MR to include not only tokens but also cubes?
Changing the name for the tokens to: White Token and the cubes would be White Cube

[drwhut]

I feel like the tokens should do for most use cases - can always open up another PR if there's demand for little cubes!