Allow az skip

1. Incorporate Availability Zone skipping.  Skip an unsupported zone in an account like this:
   ` cap-deploy -n  /opt/ecap/geocloud-ecap/applications/geoshape_geonode/master.json -p azskip=us-east-1a `

2.  Allow creation of dev vpc only for faster multiple deploys.  This isn't available for prod yet.  Be sure to subscribe to relevant images.  Create the vpc like this:
    `cap-deploy  /opt/ecap/geocloud-ecap/applications/vpc/dev_only.json -p azskip=us-east-1a`

3.  Launch just GeoShape into a preexisting VPC.  Must be one of the ones created with dev_vpc, above; names are hardcoded for now.  Launch into a deployed dev vpc like this:
    `cap-deploy -n  /opt/ecap/geocloud-ecap/applications/geoshape_geonode/master.json -p azskip=us-east-1a -p deploy_id=INFSTR-DEV-2014121521-CR`