Add jsdoc output for base classes
Add jsdoc output for base classes

Now we can see when one class extends or inherits from another.

Issue #1259

Change-Id: I14fc6361ed6c967d87e8aa9da0fc7c12e4177faa

shaka-project/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,tvoli/shaka-player,vimond/shaka-player