Remove extra numerals from the thermo file.
Handle the case where the known species file is 
completely empty.
Make edits to n-heptane thermo file to fix typos
and bugs.
Some known species for n-Heptane model.
Fix a bug where it wouldn't update the tentative
matches with a user entered one.
Fixed some more bugs related to tentative matches.
Add irreversible reaction sign to non-green list
in unid'd reactions.
Confirmed species in n-Heptane model.

These were confirmed by a mixture of Victor, Shamel, and myself.
Not very good for accountability - we should log who clicks what!
Hopefully we're all trustworthy though...