Established package structure, Created build.xml, Created Keypad buttons with no functionality, and created GUI that displays buttons with no functionality
Current functionality of calculator: Has full functionality for +, *, -, / operations. Has keyboard and jbutton functionality. Displays operations and result to jlabel at top of gui. Has ability to clear and backspace.
I removed the inheritance structure of MessageDestination, so it is no longer needed. Removed MessageDestination.java from directory
Added javadoc comments to Calculator.java
Added javadoc comments to CalculatorGUI, JLabelMessageDestination, and Keypad. Fixed javadoc comment for Calculator
Fixed typo in javadoc fo JLabelMessageDestination.java
Merge pull request #5 from sdowell/master

Resolved issues "Structure" and "Mock-up"