Changed the methods and attributes on client according to packet.java
Merge branch 'iteration2' of https://github.com/koreyconway/sysc3303project into iteration2
Changed the data structure on the client to match the packet  methods.  Added getter for file data length.
@Korey(The Boss): I need a constant  for max data length to use in my client. I have done file reading in a different way so i need the constant number 512. For now I have just created a constant in my client(temporary) . I was wondering if I can  have that maxdatalength const in TftpPacket as public. This const is in data packet but then it is private. let me know which do u think is better/efficient solution.