First commit
Updated README
Updated README
Second version

Reduced latency, more configuration options, support for multicore
File is no longer used
Fixd spacing (tabs yet again!)
Fix mine.tcl test mode (ERROR msg golden_nonce)
Third version - added ICARUS-LX150
Updatde Icarus README
Add experimental
Fixed typo
ICARUS now has single clock domain

Removed the separate uart_clk, everything now clocks from the hash_clk.
This should fix bugs caused by bad clock-crossing logic.
Revert to separate hash_clk and uart_clk domains

Combining into a single domain was just plain wrong (as noted in the
issues), so reverted it. Fixed the clock crossing (I hope). Note the
`define ICARUS in ltcminer_icarus.v is passed to `include'd hashcore.v
to specify particular behaviour.
Removed midstate

Midstate is not supplied when running a stratum proxy with -nm. Its not
used anyway, so removed it.
Reduced uart_clk from 100MHz to 12.5MHz

Should improve router performance
Experimental code
Parameterised multicore

Set the number of cores via LOCAL_MINERS. Results queue is just a
multiplexer, but FIFO would require changes to virtual wire protocol.
Fixed average hash rate reporting
Additional test data
Updated ICARUS ucf to fix leds

Set the TMP pins to PULLUP so as not to light the HOT led. Disabled the
IDLE led. Also changed I/O from 2.5 to 3.3V since this is what the board
runs at.