Update Windows scripts to launch daemons with less RAM and fix a few
other issues

Conflicts:
	run2.cmd
Tweak web UI so that people don't get confused about master URL format

Conflicts:
	core/src/main/twirl/spark/deploy/master/index.scala.html
	core/src/main/twirl/spark/deploy/worker/index.scala.html
Use a separate memory setting for standalone cluster daemons

Conflicts:
	docs/_config.yml