implements active space coefficient rearrangement for non-rel cas methods.
test suite example also added.
Merge branch 'master' of https://github.com/shiozaki/BAGEL

# By Ryan Dave Reynolds
# Via Toru Shiozaki
* 'master' of https://github.com/shiozaki/BAGEL:
  std::isnan(double t) seems to work.
molden up to g shells (unverified, but there is a good chance that this is correct)
Merge branch 'master' of https://github.com/shiozaki/BAGEL
test takes too long for now.
Merge branch 'master' of https://github.com/shiozaki/BAGEL

# By Toru Shiozaki
# Via Toru Shiozaki
* 'master' of https://github.com/shiozaki/BAGEL:
  molden up to g shells (unverified, but there is a good chance that this is correct)