BubbleChart: Added alumni filter placeholder
Updated TODO
Sankey: Changed block color
Updated data
BubbleChart: Selective highlight
Added course alumni view service for cross-controller state change
Added AlumniBar
Added coursePath controller
CoursePath: Added AlumniBar
CoursePath: makes frames scrollable
Fixed controller dependency
BubbleChart: Refactor out AlumniBar
CourseAlumniService: Cleanup debug codes
CoursePath: Fixed layout.
ReaderService: Added JSON reader
Switched to real dataset