[evol] uncomplete MapMaker bot implementation (global cyborg classes, use of EventMachine with UNIX socket backend, configuration adjustments, ...) (refs #31)
[licence] updated copyright years and added missing headers
[evol] add missing licensing terms
[evol] backup zone before replacing, reload zone, and rollback zone if reload failed
[evol] implement changing a zone
[evol] new DNS class to manage zone files (only read zone file at the moment) + generate proper mail reply