fix dgemm interface bug due to omp thread partition

molden example

fix bug in fci_rdm.c which free memory in wrong place

spin square for FCI wfn

add density fitting HF, DF-MP2

add the missing example uhf_casscf

fix bug in symm for linear molecule. Add symm support for fcidump

import modules in pyscf.future

add mcscf, cc, more fci solver

change cmake layout