Add ability to split charts

[stormpython]

Other visualizations in Kibana offer the ability to create split charts on some aggregation. Tag clouds should also offer this option.

[stormpython]

The vis code already has the ability to split charts. This needs to be put into the controller and in the less file. Possibly need to add ability to create chart titles as well.

[stormpython]

After further consideration, I am not sure this would be appropriate. The issue has to do with how this would look visually.

Above, there are 3 charts laid out in a grid. Its hard to see where one chart ends and another begins. This could be remedied with more padding, however, small multiples like these are used to compare charts. With word clouds, comparison seems very difficult and I am not sure you can extract much information from this type of comparison.

I am closing this issue for know, but if anyone has any ideas at a good way to do this, this issue can always be reopened.