Removal of code associated with entry.history which is now deprecated.
Specify families = 'all' when loading database as required by updates in RMG-Py.
Make sure to set dataFormat to something in thermo entries.

Fixing unreferenced variable exception.
Don't fail when thermo cannot be converted to NASA.

At least display something on the website rather than errors..
Created getTransportDatabase function in database tools for returning transport data.

Currently transport only has `groups` and `libraries` sections.  Does not
include depository like thermo.
Fix group drawing with other versions of pydot.

Added quotation marks to number values for compatibility with 
other versions of pydot.  Hopefully this is backwards compatible.