Add run.bat Windows helper script to mirror run.sh for Linux.
Add run.bat Windows helper script to mirror run.sh for Linux.

Sources virtualenv in .venv if available, creates server.ini if needed, and calls out to paster.

natefoo/pulsar,jmchilton/lwr,galaxyproject/pulsar,jmchilton/lwr,galaxyproject/pulsar,ssorgatem/pulsar,jmchilton/pulsar,ssorgatem/pulsar,jmchilton/pulsar,natefoo/pulsar