TEMPORARY bump to SNAPSHOT version of MiniMaven

Required for the bug fix regarding .jar file generation with sources.
We tried to release a new MiniMaven, but had problems due to Sonatype
timing out. Until the release works, we'll have to use the SNAPSHOT
version instead.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Ensure that .jar files include the correct sources

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
'Java' is really the name of the language implemented by this engine

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