All these changes were required because for tranlational symmetry - of Irrep is not the same as Irrep.
Merge remote-tracking branch 'github/master'
Made changes to symmetry. In all previous symmetries -ve of irrep is the same as irrep. But when we have Lz symmetry -ve of this symmetry is -Lz
Now DMRG can do dinfh_abelian symmetry calculations as well
Merge branch 'master' of https://github.com/sanshar/Block