Fix minor mistake in README
Fix typo in getopt specification

The --verbose long option was not properly recognized.
Break common shift statements out of case block
Capitalize 'program' variable
Allow config files to override settings

PROGRAM will be prevented from being overridden.
Capitalize variables
Order variables alphabetically
Add -c,--config option

Takes a file and adds it to the list of config files. Can be specified
multiple times, later files override earlier ones.