Package improvements: read literature

[vaibhavkarve]

• Read: 12 steps to scientificpython: http://www.davidketcheson.info/2015/05/10/rock_solid_code.html
• Python Package Structure: Dead Simple Python: Project Structure and Imports - DEV
  https://dev.to/codemouse92/dead-simple-python-project-structure-and-imports-38c6