Report mode extension

Changes in version 0.2.0

• changes in report modes:
  • 5 new fingerprint generation modes
  • changes are incompatible with previous version 0.1.0
  • caused by improved analysis of the tool performed for the forthcoming academic paper
• Hfinger now supports installation through pip
• added support for importing from Python scripts
• package is restructured
  • no subpackages
  • incorporating some of the changes proposed by https://github.com/ventaquil
• extending exception support
• fixed problems with computation of some features
• README fixes