added updated version of SimpleGui1 to my src directory - done with Step 5
finished step 8: fix the snowman
copied files from pconrad/advanced/ and changed the package name
Wrote the bongo class and a preliminary AllMyDrawings class
Finished with step 11, wrote the Drumset class, and changed AllMyDrawings.java
Merge pull request #12 from mliou/master

Created Bongo and Drumset under the mliou directory