Ptplot

* typescript file now included in `MANIFEST.in`
* Adding nodejs to env files
* Fixed an issue that was preventing hoverlabels from appearing on orientation plots.

Adds a new argument to `ptplot.plot.Positions` to allow users to plot the orientation of players. Also does some under-the-hood enhancements.

Due to a Bokeh issue animations of the ball weren't updating appropriately. This is a small release that *should* patch that problem.

This release completely overhauls both the user interface and the plotting backend for `ptplot`.
* Instead of Plotly `ptplot` now uses Bokeh under-the-hood. This allows for much more control over all aspects of plotting, especially in terms of interactivity where Plotly was very restrictive in ways that would seriously limit the visualizations I wanted to make.
* Instead of an object-oriented approach `ptplot` now uses a [grammar of graphics](https://www.amazon.com/Grammar-Graphics-Statistics-Computing/dp/0387245448/ref=as_li_ss_tl)-style layered approach to building visualizations. This should make `ptplot` more intuitive to use, especially for people used to packages like `ggplot2`.

This is the first "official" release of `ptplot`, suitable for general use.

This release is simply to test uploading functionality to pypi.