adding a bunch of analysis code

findSpikes has more functions in it, toolbox has more useful code in it.
cleanup code, statistical plotting code

also a bunch of weird shots, edge cases where my analysis code failed.
restructuring / rearranging / renaming

Terminology "spike" --> "hit".

also moving functions closer to their logical home.

haven't tested anything yet, have probably broken something.
reorganizing files
more reorganization
adding hit-by-hit correlations, doesn't work yet

next up, add graph-based clustering?
hit grouping via graph algorithms works now

seems ok.  on to statistics!
revamping cleanupData, adding more stats

seems to be some separation-dependence in correlation!
correlation plots work now

splitting plotStats code into statistics and plotCorrs.  plotStats is
going away in the next commit.
removing plotStats
cleaning up imports
afterpulses still a problem

tweaking AP, hit grouping algorithms a bit.  Doesn't seem to help much.
starting work with cross calibrations, timing

seems to actually be measurable variation by position.

Also played a bit with linked axes.  I like it!

time delay info in conf.py.  probably not the right place
fixing, automating plot generation
tried scaling by mean, wasn't useful

data's just all over the place when you magnify the less-intense shots.
correcting plot labels
starting work on AGU poster

also a bit of renaming, leftover from work in Norway that didn't get
committed.
getting back up to speed

at some point plotCorrs.py and related files got deleted...?!
resurrecting plotCorrs, plotPosStats

not sure when they got deleted, but I don't think they were supposed to
be.
keep on trucking...  just out of battery.