add tag: user's roles

[Mwthorn]

I would like a tag that returns a list of a user's roles. There are a few ways to make this work, here are some of the options I can think of:

1. Make a new object called member which is pretty much the same as user but for an object in a group.
2. Extend the user object and give the tag a group input discorduser@user.roles[<discordgroup@group]>

I prefer option 2 since it feels more simple but I want to know what others think of this.

[mcmonkey4eva]

I did this already yesterday but forgot to finish testing and commit