Update EditAxes to handle units and calibration
Update javadoc
Make restructure plugins maintain calibration
Fix ImageJ1 48x48 logo filenames

They were erroneously labeled as 64x64.
Add ImageJ1 64x64 icon
Use scijava pom 1.74

In this pom the Imglib code has changed such that the Dataset signature is
derived from ImgPlusMetadata rather than the now obsolete Metadata.
Define a pure IJ2 version of Show Info

This version is neccessary to display correct data type information for the
given set of data. IJ2 supports more data types than IJ1 and the legacy
plugin results could be misleading.
Change how newlines handled
Remember to tag values with units

While at it refactor for code reuse.
UIPreprocessor: fix bug with null defaultUI