Transaction signing in pure python discussion

[youkaicountry]

Research should be conducted on a pure python solution to transaction signing.

[youkaicountry]

Assigning this to the testnet project for now, for lack of a better place to put it.

[youkaicountry]

Things to investigate:

• How transaction signing works in steem-python
• Bitcoin libraries in python would use the same algorithm
• While not pure python, it might be prudent to research python-openssl bindings

[youkaicountry]

Here is a reasonable looking pure python ECDSA implementation, public domain: https://github.com/warner/python-ecdsa