Fixing development issues and documentation

Mainly changes to the internal workflows for continuous integration.
Upgrade the documentation to correspond to changes in the MolSSI theme, mostly not visible to users.

Initial release

Initial release providing the following:

• Generating lists of all valence terms – bonds, angles, dihedrals, and out-of-planes – plus their value for the current structure. This functionality relies on the description of the bonds in the structure.
• Creating lists of terms and their values as specified in the input. Note that in this case the atoms do not need to be connected by bonds in the structure.
• Printing the tables of results to the output.
• Outputing the data to one or more tables.
• Storing the data in the internal SEAMM database. (Coming soon!)