Add in ability to give negative points.

[MattPitlyk]

No description provided.

[kylesykes]

Could support an optional NEGATIVE_EMOJI environmental variable to make it flexible.

[JacobJerrell]

Add functionality, but don't make it actually subtract points from the user:
POINTS_RECEIVED
NEG_POINTS_RECEIVED

I have functionality up and running. I'm having issues incorporating it into the leaderboard though. Trying to produce something like:

| User : 5 fireballs, and 3 glasses of water

If turned on, it will basically have two points to track instead of one. No one will actually have the ability to subtract points though. Probably need to rework my code to make this feature optional.