introducing zcashybrid class. essentially identical to non-rel hybrid.
removed overlooked debug code
make rms_grad_ complex, update of some output.
minor cleanup
removed microiterlog from zcasscf. all auxiliary output now in casscf.log
Merge branch 'master' into zcas_new

* master:
  minor cleanup
  suppressing some output so bfgs is more similar to superci.
  Not sure why these keep reappearing...
  commented out until #47 is solved
suppressing some output to have a more uniform output from zcas and cas calculations.
modified the way the energy is handled during optimizations. output is nearly standardized between rel and non-rel implementations
output from cas now standardized for rel and non-rel calculations.
Merge pull request #38 from shiozaki/zcas_new

4-component hybrid MCSCF