cc auto code
availabl to remove duplicate diagrams
save all trials
small change in label-function
add one-electron operator
count loops and holes to determine sign
even and odd permutations
add spatial CC
add regroup feature
modify regroup algorithm
change regroup function
add function to decide symmetry
regrouping for CCSD works
Merge branch 'master' of ssh://github.com/sunqm/cc