All of spigot's files related to their mappings have the following in their header: `(c) 2014-2020 SpigotMC Pty. Ltd.` This file header is effectively `All Rights Reserved` due to no legal language on the file or repository specifying any other licensing.
Per the file header of spigot's mappings (albeit minimal mappings) is incompatible with yarn's license and as such cannot be used.
Further discussion about Paper, which uses the same mappings as spigot in their patches for the root of their project should be discussed. Paper's `OBFHELPER` commented method renames are pseudo dual licensed (LGPL or MIT) depending on the author of the patch (as specified by their license file: https://github.com/PaperMC/Paper/blob/master/LICENSE.md). Though, these may not be compatable with yarn's licensing with the LGPL or MIT licensed patches, or haven't been lifted from other projects (MCP, Spigot, or Mojang's mappings).
* Add CONTRIBUTING.md, mention mojmap being ARR
Closes#1221. Created CONTRIBUTING.md file that is basically
a copy-paste from the README.
Closes#1209. CONVENTIONS.md now mentions that names from
mojmap should not be used.
* Suggestions
Changed old named jar to yarn jar
Beautify readme and added groups to gradle tasks
always indent with tabs
Signed-off-by: liach <liach@users.noreply.github.com>