hw4-project

Additional hw4 funtimes. 

Notes:
1. Whoops! The commit was cheering for stacked bar chart. It was supposed to be stacked area chart. Went ahead and made it from our ecstasy project data. 
2. Played with d3.layout.stack. Better understanding through commenting, to come.
3. Better understanding of how chaining methods work, getting better at reading javascript.
4. Some debugging needs to happen in the hover/mouse-click methods.