Add corrections for various model chem in cantherm

All these values are still a work-in-prgress obtained from Beat.
However, the recent updates for cantherm made by Shamel and I are a bit
incomplete without these.

Atomic energy corrections are provided for:
CCSD(T)-F12/cc-pVDZ-F12_H-TZ
CCSD(T)-F12/cc-pVDZ-F12
CCSD(T)-F12/cc-pCVDZ-F12
CCSD(T)-F12/aug-cc-pVDZ
B-CCSD(T)-F12/cc-pVDZ-F12
B-CCSD(T)-F12/cc-pCVDZ-F12
B-CCSD(T)-F12/aug-cc-pVDZ
DFT_ks_b3lyp
MP2_rmp2_pVDZ
MP2_rmp2_pVTZ
MP2_rmp2_pVQZ
CCSD_DZ
CCSD_TZ
CCSD_QZ
CCSD_core_DZ

Bond energy corrections were added for CCSD(T)-F12/cc-pVDZ-F12

Additionally, there were bug fixes and additional unit tests for the
Molepro parser.