Adding basic doc and constructor
Adding a few more api points and how they will be implemented
Adding removeDataset and _getDrawer and relevant drawer
Moving pie to Plot module
Porting dataset functions to piePlot
Very basic pie plot implementation
Basic pie plot is up
Have test account for IE
apply -> call where applicable.  Add return type to pie function
More apply -> call
Documentation return type fixes
Merge pull request #988 from palantir/piePlotBasic

Pie plot basic