New MM firmware released for Avalon4, Hardware model: MM-4.0, Version: 401501-4778d610

Firmware Details:
    http://downloads.canaan-creative.com/software/avalon4/mm/2015-01-19/

ChangeLog:
* Support voltage adjustion by miners.
* Move the frequency table to CGMiner.
* Turn down LM32 CPU frequency from 100MHz to 50MHz.
* Update the ASIC clock configure method, more friendly with power supply module.
* Fix LED warning blink when get new stratum.
* Move the miner's Localwork statistics to Verilog HDL side.
* Fix negative temperature.
* Add new command for MM I2C TX FIFO reset.

Fengling