Proposal: Add label under icons

[Vincent14]

Use case: it’s not always clear for our users to know what icons mean

How to solve: it could be possible to think about an option to display/hide labels

ps: readme.txt could be renamed readme.md or c/c for a better Github display :)

[annaghi]

As we discussed on the WP Forum, it is a WIP.
And will make this repository to be more repository-like :)