First implementation of bokeh.chart histogram. I support kwargs and chained method for some plot customization.
Deleted unused commented code, adding basic bar plotting. Reorganizing the data adquisition.
Added stacked and grouping bar charts. Took an 'all insid the datasource' approach.
Made notebook option chained.
Added an intermediate proto class to inherit diferent chart types.
Added charts notebook examples.
Added scatter chart.
Working guides at multiple zoom levels.
Made histogram robust to acepted an ordered dict to plot multiple histogram. Added some additional helper methods to avoid code duplication. Used a better color scheme.
Axis working on ar downsample
Adding spread shader
Making unused serverdatasources non-fatal
Restoring accidentally removed plot
Ending merge
Only imports abstract_rendering if executed against.  Updated error message
Merging master...
Added pandas dataframe and groupby compatibility.
Added some styling properties to quads and rects.
Updated example ipynb.
Deferred load of abstract-rendering to use time on server.