updated Coinmetrics HTTP API from v2 to v4

Coinmetrics API v2 has been depreciated, so v4 is a must-upgrade

Added estimated next halving date

All you need it one file: s2f.py

Added --tor option

Added option --tor so one can use the TOR Onion routing to access data.

linted, autopep8

• This is just a single Python file called s2f.py.
• So you don't really need a release.
• Just grab the s2f.py file. That's it.

with improved argument handling

• This is just a single Python file called s2f.py.
• So you don't really need a release.
• Just grab the s2f.py file. That's it.

Initial release

• This is just a single Python file called s2f.py.
• So you don't really need a release.
• Just grab the s2f.py file. That's it.