add main() method for testing to mod contrast map plugin
setup interactive test as package reusable method in SIMcheck_
tidy plugin method access modifiers and parameter fields
tidy util, profile, FFT method access modifiers and parameter fields
tidy Cal method access modifiers and parameter fields
add bead lawn test data and update README Re: tests
test() method for Cal_Phases, create static utility class J
move non-IJ utility methods from I1l to J class
update README, move method I1l to J
all J class methods now math - renamed to JM (Java Math)
sort JM methods alphabetically
move all test data definitions to a TestData interface
rename Util_positive_16bit Util_Rescale and add test main()
minor update to README