Begin adding new track selector subclass to WebApollo to allow hiding of the User-created annotations.
Note: we can add this to the instance by specifying the full path to the trackSelector in the trackList.json

"trackSelector": {
      "type": "WebApollo/View/TrackList/Hierarchical",
}
Complete the modified hierarchical track selector to remove the 'Annotations' and 'DNA' tracks
Merge branch 'master' of https://github.com/GMOD/Apollo
Creation of LICENSE file and other small merges