commit before origin pull
Merge branch 'master' of https://github.com/bvrstich/peps

* 'master' of https://github.com/bvrstich/peps: (52 commits)
  working running version
  right to left propagation implemented
  from right to left, already works for right and middle part
  bottom to top works, now do right to left
  I don't understand, but update works now...
  the whole second row N_eff is correct without update
  second site of second row, N_eff is correct
  error in update
  more or less implemented middle part of bottom to top propagation
  top row update done
  fixed error
  error in update, check it out tomorrow
  implementing propagation with full update
  at update
  started rewriting the update
  added namespace contractions
  finally energy works completely
  for Random PEPS energy gives difference...
  also works with x,y,z-Hamiltonian
  energy reprogrammed with general nn-hamiltonian
  ...

Conflicts:
	makefile
Merge branch 'master' of https://github.com/bvrstich/peps

* 'master' of https://github.com/bvrstich/peps:
  added 'makefile' to .gitignore
who knows
Merge branch 'master' of https://github.com/bvrstich/peps

* 'master' of https://github.com/bvrstich/peps:
  tweaking some parameters
  MPO compression now used good guess
  added some features:
Merge branch 'master' of https://github.com/bvrstich/peps

* 'master' of https://github.com/bvrstich/peps:
  let run anyway...
  added some debug functions
  checked propagator/trotter, seems ok...
  found error/suspicious behaviour of code