Switch to --space as boolean param and use manifest.yml to infer app

Signed-off-by: Stephan Hagemann <stephan@pivotallabs.com>
Hardcode the loggregator server as loggregator.SUBDOMAIN

Signed-off-by: Mike Gehard <mgehard@pivotallabs.com>
Require cf >= 4.2.5

Signed-off-by: Glenn Oppegard <goppegard@pivotallabs.com>