Added escape function for special characters in XML
Added escape function for special characters in XML

telukir/PubMedPortable,KerstenDoering/PubMed2Go,KerstenDoering/PubMedPortable,KerstenDoering/PubMedPortable,telukir/PubMed2Go,telukir/PubMed2Go,telukir/PubMed2Go,KerstenDoering/PubMed2Go,telukir/PubMedPortable,KerstenDoering/PubMedPortable,KerstenDoering/PubMed2Go,telukir/PubMedPortable