Upgraded code-base to Python3 (First stage, tests follow)
Removed some pep8 warnings/errors.
Use RawConfigParser for writing of the configfile
Fixed some python style flaws
New method config._upgrade_file_format()

All migrations are moved to Configuration._upgrade_file_format().
Furthermore the property 'title' of show object gets renamed to
'name', it's no longer a suggestion.
Ignore config files and logfiles in project folder.
Reduced complexity of Configuration._upgrade_file_format() by splitting it into partial methods.
Moved config section 'stations' to attribute 'stream_url' in every station's sections.
Replaced capturadio.util.url_fix() by py3k's better urllib.parse.quote_plus()
Minor fixes.