Add -l/--logfile flags
Add -l/--logfile flags

In order to work around the limitation in the launchd plist file format
of not being able to express stderr/stdout location relative to the home
directory, add a flag to clipper to allow us to set it from the command
line. ~ in the path will automatically be expanded.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

wincent/clipper