Need to document remaining modules

[leethomo86]

The following modules still do not have Doxygen documentation:
mqc_files.f03
mqc_gaussian.f03
mqc_molecule.f03
mqc_FullWavefunction.F03
mqc_algebra2.F03
mqc_datastructures.F03
mqc_general.F03
mqc_interface.F03
mqc_matwrapper.F03

[leethomo86]

Documentation for mqc_molecule.f03 added in commit #165