Graphics improvements

* Added -nomargin option
* subplots now use multiple rows, if necessary
* EtsPlot removes points for which there is no data (instead of value 0)
New plots and other improvements
* Added BaseRate, DRocNorm, OddsRatioSS
* Special precip thresholds in DRocPlot
* Added -noobs to map

Conflicts:

	graphics/files/ThresholdPlot.py
	graphics/files/VerifPlot.py
	graphics/verif
Put map resolution code in Common
Use 'weightOrder' instead of 'order' when defining dDist16
Reorder to match other branch
DRocPlot twice in getAllTypes
Allow Threshold metrics to be on an interval

Conflicts:

	graphics/files/VerifPlot.py
Fix -leg for obsfcst plot

* A bug in the legend generation meant that -leg was ignored for -m obsfcst