Modifies #apps to handle inputting multiple hostnames in creds.host. May break Getting apps in org pivotal / space docs-runpivotal-staging as cfaccounts+cfdocs@pivotallabs.com...
OK

name             requested state   instances   memory   disk   urls
docs-blue        stopped           0/2         256M     1G
docs-green       stopped           0/2         256M     1G
docs-pws-blue    stopped           0/2         256M     1G
docs-pws-green   started           2/2         256M     1G     docs-runpivotal-staging.cfapps.io    intended functionality in pusher.rb.

Signed-off-by: Brenda Chan <brchan@pivotallabs.com>