jindent
Fix a bug in the createPotentialTemperature method when there is no time
in the field and fix a bug that crops up with Yuan's recent change.
Fix a bug in extractPressureFromNWPGrid
Rework layout and bug fix: label interval 0 means no labels [1587]
Save/restore front flip state [1450]
Fix the problem of the AxisScaleInfos not being restored from a bundle.
Use doubles to store the base and increment in the LatLonAxisScaleInfo. 
Adjust the classes that use it accordingly.