New MM firmware released for AvalonMiner 6.0, Hardware model: MM-60, Version: 601601-5d8a1270

Firmware Details:
    http://downloads.canaan-creative.com/software/avalon6/mm/2016-01-25/

ChangeLog:
* Add mm package header verify
* Update pll couter for separate module
* Update iic address free mechanism
* Update fan rpm detect
* Fix duplicate address during detect
* Fix freq setting lost cause by mm was toohot

Communicate:
    http://lists.canaan-creative.com/cgi-bin/mailman/listinfo
    IRC: #avalon @freenode.net

Documents:
    https://en.bitcoin.it/wiki/Avalon