Create a README.md

[mattab]

It would be useful to have a readme for this project, to present the project, invite contrbutors and explain how to contribute, what are the licenses of icons, and any other relevant/useful info.

(The README.md will also be visible within Piwik packages and may be seen by users who browse the Piwik files and icons)

[Findus23]

a817757

Just a basic placeholder until I find time to write a detailed documentation.

[des-innocraft]

There is now a README.md file found here --> https://github.com/matomo-org/matomo-icons/blob/master/README.md . Closing this ticket and create a new ticket if changes needs to be made on the README file.