Add preliminary deployment script

I don’t yet know how the `on` option works…?

.travis.yml

@@ -46,21 +46,6 @@ notifications:
   campfire:
     secure: "JJezWGD9KJY/LC2aznI3Zyohy31VTIhcTKX7RWR4C/C8YKbW9kZv3xV6Vn11\nSHxJTeZo6st2Bpv6tjlWZ+HCR09kyCNavIChedla3+oHOiuL0D4gSo+gkTNW\nUKYZz9mcQUd9RoQpTeyxvdvX+l7z62/7JwFA7txHOqxbTS8jrjc="
 
-before_deploy:
-  - ASSETS_HOST=https://s3.amazonaws.com/travis-error-pages ember build --env production
-  # delete some of the stuff that's useless for maintenance page
-  - rm -fr dist/assets/*.js dist/images/emoji dist/index.html dist/images/sponsors
-  - cp dist/maintenance.html dist/index.html
-
 deploy:
-  provider: s3
-  access_key_id: $MAINTENANCE_S3_ACCESS_KEY_ID
-  secret_access_key: $MAINTENANCE_S3_SECRET_ACCESS_KEY
-  bucket: travis-error-pages
-  skip_cleanup: true
-  acl: public_read
-  local_dir: dist
-  region: us-east-1
-  on:
-    branch: master
-    condition: "$EMBER_VERSION = default"
+  provider: script
+  script: ember deploy prod --verbose --activate