Refactor lazyserver.sh to lazystarter.sh and provide lazycelery.sh (#270)

Refactor lazyserver.sh to lazystarter.sh and provide lazycelery.sh (#270)

Bug #270 asks for a lazycelery.sh script much like lazyserver.sh.  Rather
than duplicate the code, I consolidated them into a single script,
lazystarter.sh.  The script reconfigures itself a bit, and runs a
particular server, based on the name that's used to call it, but no matter
what it uses the same code to offer help and find configuration files and
server launchers.  Hopefully this will make it easy to add other
features/fix bugs as needed in the future, and have them stay in sync.