Discarded results from ChemSpider that were 'Found by splitting query string into separate tokens' as it was giving incorrect results

A dictionary of bgcs->[list of compounds] now stores the corrected name of each compound. Not used currently but could be in the future

If you don't have RDKit installed, you can comment the appropriate lines.
Fixed some typos.

requirements)

Complete rewrite. Joined code from another, separate sript which queried databases by compound name.
(Hopefully) much more useful output, including compound name for each BGC
This is reflected in the README

Bug: if the Security Token is incorrect, the program aborts (haven't been able to catch the exception)