Plugin support

If a plugin you like is not available on www.luarocks.org, you can add support for it in several ways:

• As the plugin author, follow this guide https://github.com/nvim-neorocks/sample-luarocks-plugin
• As a plugin consumer, follow instructions at https://github.com/nvim-neorocks/nurr
• If you feel lazy and desperate, post it https://github.com/nvim-neorocks/rocks.nvim/issues/111 and hope for someone to pick it up