Mark the split from scijava-common

With this commit, scijava-scripts is its own repository. The history was
rewritten using the command

	git filter-branch --subdirectory-filter bin

based on the commit e08c5dea(Bump scijava-common to 2.8.0-SNAPSHOT).

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