Correct toolbar timing bar widths

It is relative to the remaining width, not the full width of the cell.
Also restructure the contents of the timers array, now it's (stat, start,
duration, end), not (stat, end, duration, end + duration), which was probably
an error.
Add timer summary to the toolbar
Clearer toolbar graphs, move count to right axis

Also summarized per 60 seconds for comparison with graphs from other sources.
Show comparison bars for timing in toolbar

Click on a timing and you see the "ghost" bars in the other rows, showing you
what happened at the same time. Also sort the rows by the start time, not the
end time.
Merge toolbar timing bar width fix

andymckay/django-statsd#35
Merge toolbar timers

andymckay/django-statsd#36
Merge toolbar graph clarity improvements

andymckay/django-statsd#37
Merge toolbar timing comparison

andymckay/django-statsd#38

Conflicts solved:
	django_statsd/templates/toolbar_statsd/statsd.html