SwingStatusBar: fix bug in warning status messages

The problem was introduced in f81648f65ce235775487c94abaf8aa27b6da0fef.
A StatusEvent is fired with "" message, which the SwingStatusBar
overzeaolously converts into the status bar's default version blurb
using StatusService#getStatusMessage. But if the status event is a
warning, we should not do that.

Fixes #50.
Remove no-longer needed integration test configuration for ij-legacy

The integration tests moved to ij1-patcher...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Do not override the ImageJ 1.x version for ij-legacy

We used to require an out-of-line version of ImageJ 1.x that had a bug
fix regarding redirecting error messages. By now, an even newer ImageJ
1.x version (containg a couple of regression fixes, too) made it into
pom-scijava, therefore we do not need to override the dependency version
any longer.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
SampleImageUploader: improve usability

Added a helper method to format the URL, replacing spaces with
underscores. Previously, anything after a space would just be truncated
from the file name - removing file extensions, which was annoying.

Also added an "upload complete" status message, as for most datasets the
upload was too fast to see actual progress updates, so it just looked
like nothing happened.
SampleImageUploader: use URLEncoder instead

Instead of using a helper method to decide what URL encoding fixes are
made, it makes much more sense to just use URLEncoder.encode with UTF-8
encoding format.
SampleImageUploader: don't encode the whole URL

Was mistakenly encoding the entire URL with URLEncoder.

We just want to encode the file name, since the base url is specified
appropriately.

So we'll just use file.toURI.toURL to do standard file encoding, and
then pull off the actual file name.
Add a note about running Eclipse instances to RELEASES.md

This commit is dedicated to Stephan Preibisch.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump to pom-scijava 1.150

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>
Bump to pom-scijava 1.151

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>
QuitProgram is not headless friendly!
TableDemo: add FIXME reminder
Bump to pom-scijava 1.153

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>