Add a LICENSES entry for the Sholl Analysis plugin

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
MediaWikiClient: Shut up Eclipse

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Make the Script Editor ready to be called without an IJ instance

This is needed for Wiki Editor debugging.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Prepare the Wiki Editor to be run without an ImageJ instance

... for debugging...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Prepare the Wiki Editor for newer MediaWiki versions

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Wiki Editor: make it clear which Wiki we want to log into

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Wiki Editor: be more verbose in case of a failure

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Wiki Editor: newer MediaWiki engines return 404 on non-existant images

Earlier versions would still return 200. The browsers show exactly
the same text, though...

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