Boxes.el: Updated metadata for packaging.

[Mike-Woolley]

I need the following changes before I can commit packaging data to the Emacs package repository (otherwise it won’t be accepted):

● Updated metadata for packaging.

● Updated usage instructions, as these are shown by the package manager.

● Changed the documentation for 'boxes-command-on-region' to comply with elisp style guidelines / suppress compiler warning.

[tsjensen]

Looks great! Let us know when it works, and what to do exactly to use it in Emacs. Then I'd put a little post on the website about it!

[Mike-Woolley]

Will do 😊

Reviewing packages can take a while before being accepted, so I'll let you know when it's live !

Thanks, Mike

[Mike-Woolley]

I built and installed the package locally, here's what it looks like in the Emacs Package Manager: