Fixing some issues with plotting positions

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

Can now plot player orientations

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

Ball positions update properly

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

Bokeh + Layers

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-style layered approach to building visualizations. This should make ptplot more intuitive to use, especially for people used to packages like ggplot2.

Initial Release

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

Alpha Release

This release is simply to test uploading functionality to pypi.