Pandas-alive

- Progress bars (thanks to [`tqdm`](https://github.com/tqdm/tqdm) can now be enabled with `df.plot_animated(enable_progress_bar=True)
- Writer can now be specified with `df.plot_animated(writer="imagemagick")`
- Pillow is now explicitly unsupported, see relevant issue here <https://github.com/JackMcKew/pandas_alive/issues/5>

- New chart type introduced: Bubble Charts, to be used with MultiIndexed DataFrames.
- Bubble charts support x & y axis by data inside MultiIndex (`x_data_label` & `y_data_label`)
- Bubble charts support size & color optionally by data inside DataFrame (`size_data_label` & `color_data_label`)
- New chart type introduced: Scatter Chart
- New chart type introduced: Bar Chart, create animated bar charts with time as the x-axis
- QOL improvements for warnings & errors
- Line charts now support filling underneath to mimic an area chart `df.plot_animated(kind="line",fill_under_line_color="red")`
- Line charts now support event labelling with perpendicular bars

python
df.plot_animated(
kind='line',
label_events={
'Ruby Princess Disembark':datetime.strptime("19/03/2020", "%d/%m/%Y"),
'Lockdown':datetime.strptime("31/03/2020", "%d/%m/%Y")
},
)

- `fixed_max` optional for all chart types
- `fixed_max` amended to work with multiple plots

- `period_summary_func` provided for charts to display overall period calculations on plot
- Bar chart functionality extended
- `fixed_order` can be used to disable bars moving on bar chart
- `fixed_max` set limits of axis on charts to be total maximum of dataframe rather than dynamic
- `perpendicular_bar_func` Plot perpendicular black bar on plot to demonstrate different stats, eg, max, min, median, etc. Use with Series.agg()

- Complete overhaul of backend with `_base_plot.py`, refactored all arguments
- README & Examples generated from README.ipynb, converted with `nbconvert`
- Docs generated only on release
- DataFrames interpolated to match animation length
- Scatter plot introduced

- Fix bar label plotting
- Update docs to render cleanly