Copied the treemap from openspendingjs and added a new context property called drilldown (and can be overwritten in context).
Copied the treemap from openspendingjs and added a new context property called drilldown (and can be overwritten in context).

This property is a function and gets called when a node is clicked. Default behaviour is the same behaviour as in openspendingjs' treemap.

citizenlabsgr/openbudgetgr,citizenlabsgr/openbudgetgr,citizenlabsgr/openbudgetgr,citizenlabsgr/openbudgetgr