created dummy servlet and added json file with dummy data to project
moved dummy servlet to Baseball.java, added data to dummy.json file. NOTE: must change path to json file to full local path in order to get it to work
not sure, some jackson stuff
added json array response
modified User class to contain all the columns we wish to display, and made the dummyJacksonData servlet return 3 of these objects to the login page when JSON button is pressed