Added licence
Added licence

Polidea/tree-view-list-android,sambabug/tree-view-list-android,sambabug/tree-view-list-android,deanpanayotov/tree-view-list-android,deanpanayotov/tree-view-list-android,sambabug/tree-view-list-android,deanpanayotov/tree-view-list-android,Polidea/tree-view-list-android