New MM firmware released for Avalon4, Hardware model: MM-4.0, Version: 401503-9281cd10

Firmware Details:
    http://downloads.canaan-creative.com/software/avalon4/mm/2015-03-12/

ChangeLog:
* Version '''401503-9281cd10'''
* Fix mm firmware revert
* Check pg when mm working
* Fix boot failure(Change bootloader with ila)

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

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

Fengling