Modified my core code to be able to compile under "make single"

Modified my core code to be able to compile under "make single"

Notes:
-Compiler does not do as many int/Integer impicit-casts as the Java compiler; result is much time spent following compiler errors to fix casting ambiguities

-ArrayList.java is ported from the Java library with Exceptions removed and only retains roughly half the built-in functions.

Future Plans:
-Impelment parsing and writing files to gain farmiliarity with using I/O.