Configuration parameters are now load from a .conf file (see template.conf as an example).
The code has 3 config levels: default (teos/__init__.py), config file (<data_dir>/teos.conf) and command line.
Most of the config parameters are only modificable trough the config file for now.
The priority order is: command line, config file, default.
Objects that need config parameters are now built in teosd instead of inside other classes. Therefore teosd acts like a factory and config parameters don't have to be passed around between objects. This also implies that a lot of the object creation logic has been changed.
This should simplify unit testing.
Logger was only used to log when a new folder was created, and was making that the setup needed to be done on the main of pisad and cli instead of __init__, which seems a better fit
