Rate limit fix & Misc.

[alex-stout]

I finally got rate limit ban from CoinMarketCap and found which error it was throwing.

This pull request does the following:

• Prints out an error when the IP address used reaches the limit and gets banned
• Removes multi-line comments in core.py. See below.

Removing multiline comments from core.py

I removed the comments from the core due to the simplicity of the program. This makes documentation easier so that there isn't two copies of the same documentation.

[alex-stout]

@barnumbirr Have you taken a look at this?

[barnumbirr]

Hey @alex-stout,

sorry for being so late on this, I'm quite busy IRL at the moment. Could you please squash your commits so it's easier for me to go through?

Cheers.