Add a README

For GitHub goodness...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Update to newer parent version

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Do not look in the parent directory for the parent POM

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Give the project the proper groupId and version

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Avoid duplicate context injection

Unfortunately, this is not enough to make the test pass on MacOSX; there
is still an UnsatisfiedLinkError.

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