Fix misleading README.txt in ij-data.jar's luts/ directory
Fix misleading README.txt in ij-data.jar's luts/ directory

The main idea of having LUTs inside a .jar file is to allow them to be
overridden by the user without having the original file being marked
as locally modified by the updater.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

biovoxxel/imagej,TehSAUCE/imagej,biovoxxel/imagej,TehSAUCE/imagej,biovoxxel/imagej,TehSAUCE/imagej