capistrano-autoscaling gem: Lookup AMI by :autoscaling_image_master_name [#81705556]

Configure in config/deply/<stage>.rb with set(:autoscaling_image_master_name,'example')

Defaults to 'stage' e.g. has-staging (in capistrano multi-stage)

https://www.pivotaltracker.com/story/show/81705556
Update to autoscaling configuration: Make Images, Create Groups, &etc.
Simple fix for: [#82068910] - Snapshot "Please wait" spinner inconsistent.

Wait message was only showing when there was also an embeddable prompt.

https://www.pivotaltracker.com/story/show/82068910
Update default drawing tool, config var.

As discussed here: https://github.com/concord-consortium/lara/commit/2f32727abf
Fix community activities pagination links[#81720432]

 - Fix lower set of pagination controls in the "Community Activities" section.