* Problem: Source files contain no license info
Solution: Add comments with SPDX license info to source files
* Python 3 files don't need # -*- coding: utf-8 -*-
* Problem: The write-a-bep page/process is daunting
Solution: Make the BEP writing process easier and more approachable
* Problem: BEP should be written uppercase
Solution: Change bigchaindb/BEPs label names to use uppercase "BEP"
