Added Zeus as a driver option to the makefile and configure files.
Added Darkwinde's driver, but renamed and updated with my changes and to be called "Zeus" instead of Icarus as I doubt the Zeus chips are Icarus FPGAs.
Tossed out the attempt to merge the icarus code from BFGMiner to the code
called "Icarus" in the cgminer 3.1.1 version.  There was too much confusing
intermingling making it harder to follow.   Brought the code over from cgminer
and put it in place instead.   At this point it builds and attempts to hash
but each hash attempt results in an invalid NONCE.  Need to dig in deeper.
Merge pull request #1 from fbatogo/bfgminer

Added Zeus as a driver option to the makefile and configure files.