Turn off the light and enter in the 21 century

[sugiiiiii]

Ok it's 80% a plagia of GitHub visuals guidelines, but atleast it's pleasant to use.

Note bene

• [x] To be more robust, the "BlockTube" logo should be hosted on the GitHub repository (and not on a free external host as currently).
• [x] Remove the [ Brackets ] around buttons

[amitbl]

Thank you for the contribution, I merged your changes and added some of my one