0.5.0

• improved: simplified notification plugin and externalized them using entry_points
• added: WAN IP detection through DNS (detector 'dnswanip')
• improved: replaced built-in daemon code with daemonocle
• switched to pytest for running tests
• changed (INCOMPATIBLE): dropped support for python 2.6 and python 3.3
• added: new command line option -v to control verbosity
• improved: infinite loop and daemon stability, diagnostics #57
• improved: updated list of external urls for IP discovery
• improved: install documentation updated
• improved: add many missing docstrings and fixed many code smells
• improved: run flake8 code quality checks in CI
• improved: run check-manifest in CI
• improved: run safety in CI