Fixing bug in ref handling for gap filling in models
Fixing bug in ref handling for gap filling in models

cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools,cshenry/fba_tools