Delete function 'rand_init_val()'
Merge branch 'master' of https://github.com/pdigiglio/temp
Edit first part of correlator cycle counters (int -> ptr)
Slight uptate to dtor
Move EB into ising and potts from reticolo
Move correlator into Ising from Reticolo
Replace 4 (number of nearest neighbours) with Reticolo::D2
Replace '*=' with '=' in cluster site-update