doc/Contributing.txt: Add note about using GitHub2015-07-19T01:20:48ZAlexander Bartonalex@barton.deAlexander Bartonalex@barton.de2015-07-19T01:20:48Zhttps://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=commitdiff;h=813ea874f86931b97df7f1e91a9e6921fb5cb139
New documentation: "how to contribute"2011-06-24T19:01:18ZAlexander Bartonalex@barton.deAlexander Bartonalex@barton.de2011-06-24T19:01:18Zhttps://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=commitdiff;h=b1786f309ecc29216a8d0b919cd514c8f69f24bf