Schneckbert v2.0

Schneckbert 2.0 is here! There is no particular reason to release a new version of Schneckbert, except that it is now much stronger than v1.0.
Sadly, Schneckbert currently explicitly and only uses avx2 in its inference, so this is the only version available right now.

Using a balanced book and stc=8+0.08 & ltc=40+0.4, the following results estimate Schneckbert 2.0's strength to be around the 3300 ccrl mark.

Schneckbert v1.0: +194 stc +241 ltc
yukari_4.3.25_avx2: -38 stc -15 ltc
stash 36: -45 stc -8 ltc