Ignore if spimreconstruction is cloned into externals/

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge branch 'master' of git://github.com/fiji/fiji
Fix duplicate property

We use Unix sorting in the properties, i.e. upper-case letters are
sorted before lower-case (so that Z still goes before a).

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