placé les algos et le proxsag correspondant dans notused
renommé proxsagcopy en proxsag
Merge branch 'weakSignal' of https://github.com/ClaraVista-IT/matrixFactorization into weakSignal

Conflicts:
	src/main/scala/optimization/PROXSAGcopy.scala
Merge branch 'weakSignal' of https://github.com/ClaraVista-IT/matrixFactorization into weakSignal
gfezg