List of unsupported MCC db entries/zones as grep patterns

See data/MCC-unsupported-zones for documentation how to add
patterns, and why some time zones as expressed in data/MCC
need to be filtered out.
Read MCC info from the MCC db file instead of saved Wikipedia page

Add command line parameter --mcc-skip-patterns, which defines
a file which contains a regexp patterns that are filtered out
from the MCC db entries. Each line of the pattern file is
considered a regexp expect if it starts with a "#" or contains
only whitespace.
Remove obsolete code that parses the Wikipedia MCC page

The Wikipedia article on mobile country codes (MCC) has changed,
and the code that parses the page does not work anymore.
Add Makefile