x15: optimize by 2ms (39ms to 37)

and clean whirlpool ifdefs, cost too much to keep both methods
small reg tunes, rename whirlcoin to whirl
update README
quark: dos2unix files to reduce problems later
sources: swith to UTF-8
windows: intercept Ctrl+C to use nvprof
whirlpool: x64 asm is very slow (30ms win32 vs 90)
vs2013: simplify project options
vs2013: hamsi need 72 registers, simd 64
output: add the --color parameter (-C)

disabled by default or if syslog option is set

Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>
groestl: small optimisation (nist5 + 100kH on a 750Ti)

But, almost nothing on X15, no big changes...
whirl: add missing merkle for some pools