Clarify license

[wezm]

You have a disclaimer at the bottom of the README that to me boils down to use of the logos is fair use. However it's unclear who the owner of the work is? Did you create these files from scratch? If so what license do you consider them to be under. If you didn't, do you know the source?

Reason I'm asking is I want to use them in a project and want to provide accurate attribution.

[tobiaslins]

All these logo's are from the original documentation/homepage - no logo is created by us. (just the dark ones are recolored)