x11: adapt some blake 256 opts to 512 one

blake512: for the moment 6.2ms vs 7.12 before (+10%)
Add pentablake algo (-a penta)

Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>
try to prevent gpu pauses
enable colors by default, except for syslog

debug: show compared hash diffs in color
Purge anti-dup data on target change
Remove debug rpc, already exists with -P
Prepare version 1.4.2