removed unused import statements
removed unused import statements, unused code, accessed static data in a static way
Added a use of unused member data (by writing a DEB.out statement which will warn us if we get to code which perhaps ought to use its changed value).
added use of unused data - unused Colors arrays (tiny, med, …) are referenced as we use an int index to specify which will be assigned as the default Colors array.
Fixed typo in buildfile description
Fixed an incorrect comment from TestDatum::toJSON.  Made some methods of TestDatum static (they referred to no class data).  Added comments for TestDatum::getContoursJSON, getZonesJSON, getShadedZonesJSON.
Removed some unused import statements. Initialised a local variable (for the compiler). Added usage of some unused variables (for the compiler). Reformatted some code so it fits on my screen.  Fixed an incorrect comment.