Added many methods, functionals, and analysis options

• Now support HF, DFT, MPn, CCD & CCSD, CBS-x, and Gn methods
• Added PBE, PBE-98, PBE0, and HSE06 functionals
• Added analysis of HOMO/LUMO gap energy
• Added plotting of orbitals and densities
• Added otuput of atomic charges and spins, and placing them on the configuration.
• Added ability to control the system/configuration update

Improved handling of Gaussian output

Rather than capturing stdout, which doesn't allow seeing the output during the job, put it in output.txt.

Initial release!

• Support running the energy or optimization with HF, DFT, MP2 and MP3 though testing has not yet been thorough.
• The DFT functionals supported are at the moment limited.