Guidelines and standards for create QCA datasets

[trevorgokey]

We currently have no standardized way to submit datasets. Typically, the person who generates the molecule input list is not necessarily the same person who prepares the dataset for submission. We need some checks and standards in order to ensure the quality of submissions.

[dotsdl]

Closing since #100 addresses this. Thanks @trevorgokey!

[dotsdl]

Reopening, as we want to add details for e.g. torsion connectivity.