Add command-line configuration setup

controller_ws_config.py is a command-line utility for creating the
app.cfg file. Config section options required/available are documented
either in as_weatherstation.controller.config (for general sections) or
as_weatherstation.app. AS_WS_STATION_* (for [station*] sections).
Default values and explanations of each option are loaded from
as_weatherstation/config/app-defaults.cfg and app-explain.cfg
respectively.
Increase PWS connect timeout for remote hosts