Add tests for config file parsing

[guyfawcus]

Although these lines are tested:

ArchMap/archmap.py

Lines 360 to 367 in 202aff5

	verbosity = config.getint('extras', 'verbosity', fallback=default_verbosity)
	pretty = config.getboolean('extras', 'pretty', fallback=default_pretty)
	input_url = config.get('files', 'url', fallback=default_url)
	input_file = config.get('files', 'file', fallback=default_file)
	output_file_text = config.get('files', 'text', fallback=default_text)
	output_file_geojson = config.get('files', 'geojson', fallback=default_geojson)
	output_file_kml = config.get('files', 'kml', fallback=default_kml)
	output_file_csv = config.get('files', 'csv', fallback=default_csv)

...it's actually only the fallback values that are used.

Some tests should be added that read the default configuration file, run the script then check the output.

[guyfawcus]

Also need to make sure that archmap.py won't pick up a config file if you have one saved at /etc/archmap.conf. Maybe by passing a bogus name to --config?

648102b#r25792932

[guyfawcus]

Added a basic test to get the ball rolling in 942973d. It simply checks that the default configuration file has not had any changes made to it accidentally.