Tune quark part of Xn funcs

based on klaus commits, will increase a bit speed of most algos

PS: main increase is due to the register count tuning in Makefile

and for skein512 on linux, its the ROTL64

but almost no changes on X11 : 2648MH/s vs 2630 before
msvc: fix the LTCG warning
Fix usage and big strings on windows (colors rel.)

vsnprintf doesnt return the len on windows on fail, so use _vscprintf