Update build.xml
finished step 4
Finished Step 4
Added two files from lab04
added java files from lab 04
Added main to Rapper class
Created javadoc
Finished Step 5
Step 4 (closure): Added old src files
finished step 5
renamed files
changes to the computer class
added main to Pickle class
updated javadoc
added main
added Main
Step 4: copied files compiled with build.xml
Added package
added two planet java files
added package line to .java files