scijava/scijava-common — pull request #80 by dscho (2014-06-07 19:49:03+00:00)
Title: Show the welcome message only once

As discussed in imagej/imagej-legacy#38.

We will most likely want to change the particulars of the change, e.g. use a constant for the preference key, and maybe even factor out a `ChecksumService`. But this PR is intended to start the discussion about the intent of the change: not to show the welcome message twice if it has not changed between ImageJ releases.