PidFile.find_files glob is too loose
Merge pull request #12 from loe/pidfile-find_files-should-regex

PidFile.find_files glob is too loose
application_group.rb: no method running? to check if any of the apps in the group is running.
controller.rb: exit with status 3 to indicate that no application is running. Fixes #11.
Merge branch 'master' of https://github.com/thuehlinger/daemons
Use $stderr.puts for commandline errors