Fix the CLASSPATHs for the command line tools

Many of the classes for the command line tools are now in
scifio-tools.jar (instead of bio-formats.jar), so when the
'SCIFIO_DEVEL' environment variable is set we need to have
scifio-tools.jar on the CLASSPATH.

Noticed by Curtis Rueden.
Merge pull request #416 from melissalinkert/cli-classpath

Fix the CLASSPATHs for the command line tools