Add characters used for minutes seconds in DDMMSS coordinates notation

[cgendreau]

Improve regex to include more characters that could be used to flag 'minute' and 'second' in DDMMSS coordinates notation.

minutes[‘'’‛]
seconds ("|“|''|‛‛|‟|”|‘‘|’’)

Provided by David Fichtmüller

[cgendreau]

All single characters are now included.
Notations with 2 characters for seconds (''|‛‛|‘‘|’’) are still missing.