Update README.md

wrap up for hand-in

testing time now

article can pickle and export entities to xml

cleaned up entire ER module. Next thing: article module needs to implement exporters for entities

random changes

xml and tokenization

added rudamentary xml export to article

moved more functions to abstract class in article

working on tokenization

random changes

bug fix not returning article object

moving tokenisation into article class

article class for communication

little bug fix