Issue #18

I've completely cleaned build.xml to remove redundancies and unused portions. General usability and readability has been vastly improved. Descriptions have been added for all targets. Command line running for melodyGUI, melody, and basicGUI has been implemented. Most targets have been rewritten for clarity, using Professor Conrad's build.xml files from labs as a reference. Javadoc URL had "13S" present in it, which I changed to "W14."

html subdirectory has been deleted.

README.md has been mildly updated to reflect changes to build.xml for command line running of various classpaths (-Darg).