Remove pomize-project script

This script is out of date. The imglib2 version properties should be
updated to imglib.version instead of imagej.version.

For the mpicbg properties, it's unclear how to resolve them now.. they
should be imglib1.version, but that property no longer exists in
pom-scijava.
Merge pull request #62 from fiji/remove-pomize-project

Remove pomize-project script
upload-trackmate: use the imagej-maven-plugin to copy the newest version

It appears that MiniMaven has slight objections to overwrite existing
files when copying dependencies, so let's make sure by pretending that
we're the TrackMate Maven project right here and let imagej-maven-plugin
do its job with the delete.other.files property set to true.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
gitignore: add ij-scripting-javascript
Build.sh: maven-helper moved to scijava-scripts

While at it, download it with cURL (no need to clone the whole
repository...).

Noticed by Curtis Rueden.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
GenericDialogPlus: organize imports
GenericDialogPlus: skip UI calls when headless

This change makes GenericDialogPlus work when running in headless mode.
It addresses the following bug discussed on fiji-devel:
  https://groups.google.com/d/msg/fiji-devel/je7frY9pu8Q/F-RJExwX8T8J
Move GenericDialogPlus main method to src/test
GenericDialogPlus: fix warnings