Temporary Read XML
Elements read from saved project

Elements are not placed in the same locations where they were before the
file was closed.
Added box size writing to/reading from file

Currently able to save information to file and read it from file. I
decided to cheap out and just use if statements and read accordingly. If
someone wants to implement classes for reading from file, be my guess. I
had issues trying to read from file because I didn't see any easy way to
pass parameters or how to keep reference to diagram model for adding
elements.