2021.04.24

• remove conflict command args with pip
  • remove --compile arg, it will only work for pip
  • -c will not be removed, pip install -c could use pip install --constraint instead
• Refactor for OOP(Object-oriented programming)
  • Will be used as the first stable version and end experimental phase
  • remove Config class
  • show version info and other logs in stderr
  • compiled should not be True while unzip is null
  • a successful message has been added to the tail of logs: Successfully built