This is aimed at improving side compound detection when using models with compartments. The traditional filter by degree often removes H2O and other cofactors from cytosol, but those compounds usually remains in compartments with fewer  biochemical activities, thus with lower overall degree for their constituents

The kegg2bionetwork tests required web connection to check DTD validity.
refactor Kegg2BioNetwork to split the DocumentFactory creation
Creates a Mock to return a DocumentFactory without DTD checking for tests

now handle GSAM files w/ carbon indexes

a function that takes a string and output a double can be passed to add flexibility in weight import

77 s vs 1200 s to read Recon3D !

Example : getReaction(id) instead of getReactionsView().get(id)
and containsReaction(id) instead of getReactionsView().containsId(id)