Remove \changes from code part

This info is much better tracked by version control, and adding it
in as comments in the code section doesn't really help end-users.
Extend .gitingore a little more
Add a range of new ACS journals to the bundle

Configuration files for:
 -  ACS Applied Materials & Interfaces
 -  ACS Photonics
 -  ACS Sustainable Chemistry & Engineering
 -  ACS Synthetic Biology
 -  Environmental Science & Technology Letters
Journal CODEN table split into two columns

There are too many journals to fit onto one page in a single list!
Some minor formatting improvements also made.
\setkeys was missing from syntax highlighting
A missing 'Table' in cross-ref.
Step version
Collect up changes in one place