- Put deamon code in Robot class
- Put package check/update code in Package class
- Use python3 f'string
- Use sentences for comments and docstrings

aurbot[3547325]: [CRITICAL] name 'fp' is not defined
aurbot[3547325]: [ERROR] Unknown error. Please report it with --debug.

Pacman hooks now handle these commands.

- Move maintainer check in update. So, no more maintainer check if there is
no need to build the update
- Move build code in a subfunction
- Improve some messages

Prevent later failure with invalid path in tarball

Since python 3.5 we need to raise an exception to prevent python to EINTR
see https://www.python.org/dev/peps/pep-0475/

Drop python-xdg deps

This replace global sleep time of the daemon

Build and commit command/duration was printed at the end of the log instead
of the time they are available