check 2D orientations in pseudo real time

[astraw]

It would be good to have a way to check 2D orientations in pseudo real time. By pseudo I mean that while the program is running you can run an analysis script and generate a graph of the 2D position tracking of what has happened up to that point in time. If you want to take this a step further, it would be great to try to implement a script that has a graphical output of what is going on in actual real time. This is a humdra-specific project to the extent that 2D orientation is estimated differently for humdra (sampling rate 5x that of wingbeat rate) versus flydra (sampling rate 0.5x that of wingbeat rate), but a majority of the legwork should be the shared.