Deleted extra points from 140429, Bax DPX requenching

There were a few extra points with time values but not fluorescence
values.
Initial commit of doc for 140429 Bax DPX

Still in the middle of writing the code to plot the raw timecourses. In
the process of streamlining the way of specifying plate layout, wrote a
couple of small helper functions in plate_assay.py.