bar chart now uses new column formatting
commited js build
Merge branch 'develop' of github.com:datawrapper/datawrapper into develop

Conflicts:
	plugins/visualization-bar-chart/static/bar-chart.js
Merge branch 'develop' of github.com:datawrapper/datawrapper into develop

Conflicts:
	www/static/js/dw-2.0.min.js