plot_2d_network_points limiting with interactive/jupyter plots

[wx4stg]

Currently, plot_2d_network_points is part of pylma.plot.xlma_plot_feature. This can be used with the interactive plots by getting a handle to the interacive figure, as used in lmaworkshop. However, when the plot limits are changed (either spatial or temporal), the points on the other axes are not updated to reflect this limit change (eg, changing time limit does not remove points from the spatial axes).

This needs to have an implementation for jupyter interactive support.

[deeplycloudy]

I've added a working implementation of this in #66.

Use of the functionality is shown in the interactive demo WIP on the WTLMA lmaworkshop branch