Add CORS for assets in nginx_unicorn_web_app.erb

Based on the suggestion from [Bugsnag](https://bugsnag.com/docs/notifiers/js/cors#instructions) so that we get error messages for scripts not hosted by us. For example, Segment.io.
Add svg to image list.

We can gzip and provide cache headers for those images.
Support strip_www on domains

Change-Id: I2e1cd67d2dc28920dff2340d1b3025ce497b48c2
Support redirecting from domains

Will eventually deprecate strip_www and force_www, as this is a generic
redirect that could handle any domain

Change-Id: I46239f123a2b28a7f424f5e901d7efc80a838bed
Remove security options from nginx

Should be set by apps if required.

Change-Id: I5d35699f430c57ca4d8cadbfeedddc55b3c78ceb
Add deploy::rails-noserver recipe
Detect existance of deploy::rails recipe
Add email notifications to monit
Improved opsworks-aware format for monit emails
Add opsworks_agent_monit::update recipe
Improve subject line based on adam's suggestions
Merge pull request #17 from freerunningtech/monit-improvements

Monit improvements
Override the rails restart command

Previously we always overrode this using the Stack Settings custom json.
As of opsworks chef 11.10, this attribute is declared as "normal"
instead of as "default", so the stack settings will not be used.

This changes our stacks to always use the restart command. It's
something we've used on every stack we've made, and is a generally
better default.
Merge pull request #18 from freerunningtech/rails_restart_command

Override the rails restart command
Cleanup stickermule branch.

We don't need all of those extra cookbooks.
Remove elastisearch submodule.
Update nginx config to gzip images in assets.
Update nginx_unicorn_web_app.erb
Add image/svg+xml to gzip types.