wadindex.pl: handle --verbose and --debug switches
wadindex.pl: find all files in path, not just wad/zip files
wadindex.pl: added constants for MIME types
wadindex.pl: Replaced File::MMagic with File::LibMagic

- Added Archive::Zip to read contents of zipfiles
- Added a constant block containing MIME types to match
- Need to change the string constants to regexes