Use Highstock to draw chart and show shared tooltip
Sort tooltip chart by listens
Highlight current item on tooltip
Update tooltip when hovering on a different series in a week
Push state to history
Set defaults on client-side
Split 'js_all' into 'js_requirements' and 'js_index'
Load options from environment variables
Merge branch 'feature/highstock' into develop

Conflicts:
	bower.json
	elaboratecharts/app.py
Show number of an item on the chart