libSBML via Antimony

The following functions (C and Python) are now available for reading and writing SBML:

loadSBMLString load SBML model using the XML string as input.
loadAntimonyString load Antimony model using the model string as input.
loadSBMLFile load SBML model using the file name as input.
loadAntimonyFile load Antimony model using the file name as input.
getSBMLString get SBML as a string from either a subset of items or all items.
getAntimonyString get Antimony model string from either a subset of items or all items.
writeSBMLFile write the SBML to an xml file.
writeAntimonyFile write the Antimony model to a text file.