Integrate with DND-Maths

[tmcclintock]

I have a repository called DND-Maths where I have a few DND related tools written. A few of them can be integrated into this repo to make full npcs.

For instance DND-Maths/Stats.py creates stat lines with different specifications, such as 3d6, 4d6 drop lowest, rerolling 1s and 2s, the suggested stat line, and others. It also calculates point buy equivalences so that you can reject a stat line if it's too weak/strong.

Another section is DND-Maths/Random-Fighter.py. This is an attempt to fully create a fighter NPC. This idea can be combined with this tool to create things like equipment loadouts, feats, skills, and class abilities that we can then use in the properties of the token.

Let me know what you think.