Added API for retrieving fit values for pulseheight MPV and drift.
Added a model for pulseheight thresholds involving mpv and drift. These
are used to create services in the nagios.cfg to monitor the pulseheight
MPVs and drifts.
Added nagios_check_pulseheight_mpv plugin for nagios.
Changed nagios.cfg to include the nagios_check_pulseheight_mpv plugin.
Added nagios return results when querying fit results via the API.
Returns readable error when a module is not found.
Fixed: it tried to access a non-existent dictionary entry "message".
Fixed: replaced string variables with number variables as they are
compared to floats.
Fixed missing string format specifier.
Moved check_pulseheight_mpv plugin to its own nagios directory.
Initial commit for script for fitting the pulseheight distribution peak
with a Gaussian.
Added fitting of the pulseheight peak. This is triggered by the
needs_update_events flag of the histogram summary.
Fixed the date offset for a parameterless request of the pulseheight
drift rate.
Changed path of pulseheight fits to a path inside django_publicdb.
Merge branch 'master' into api_quality

Conflicts:
	django_publicdb/histograms/jobs.py
Merge branch 'master' into api_quality
Merge branch 'master' into api_quality
Added a South introspection rule for the SerializedDataField.
Added initial migration for 'histograms'.
Added PulseheightFit model.
Added migration to 'histograms'.
Adds the PulseheightFit model to the schema.
Changed retrieval of fit values.
Instead of using files it uses the database now via the PulseheightFit
model.
Changed esthetics.
Changed variable name station_id to station_number. I find this more
intuitive.