Update README now that we don't need anything outside GardeningServer
Update README now that we don't need anything outside GardeningServer

Now that we don't use qunit, the http server can be started from
within the GardeningServer directory.

TBR=michaelpg@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/489733002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@180631 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs