Fix munin-node access control

In the development environment, the master server was being
denied access to connect.
Add Munin charts for memcached
Add template/install task for is_ingestion_running.sh script
Merge pull request #11 from dpla/is_ingestion_running

Add template for is_ingestion_running.sh script
Add BigCouch/ES maintenance scripts on central (refs #7738)

* Add scripts to backup, restore, and compact BigCouch databases
* Add Elasticsearch heap stats script
* Share install_ruby_tools.sh across multiple roles
* Add gems needed for BigCouch restore script via script
* Install rbenv and bundler on central
Merge pull request #22 from dpla/7738-add-missing-scripts

Add BigCouch/Elasticsearch maintenance scripts (refs #7738)
Add rotation of API and frontend logs (fixes #7737)
Merge pull request #23 from dpla/add-app-log-rotation

Add rotation of API and frontend logs (fixes #7737)
Fix: add 'logrotate' tag to include statements

This tag is necessary for include directives in playbooks that
were recently modified to enable logfile rotation.  When the
'logrotate' tasks are picked by tag, the include statement
has to be run, too.
Improve robots.txt

* Parameterize sitemap url.
* Disallow robots outside of the production environment
Merge pull request #25 from dpla/add-sitemap-url

Parameterize sitemap URL
Redirect "www" requests

Redirect "www.domain" to "domain", for search engine optimization.
See https://issues.dp.la/issues/7733
Add notifications to Munin and Slack notifier script
Merge pull request #24 from dpla/add-munin-notifications

Add notifications to Munin and Slack notifier script
Merge pull request #26 from dpla/redirect-www

Redirect "www" requests
Add site proxy cache clearing to API/frontend deployment
Use /public as frontend app root
Merge pull request #27 from dpla/clear-cache-and-fix-nginx-frontend-config

Clear cache and fix nginx frontend config
Bump version to 0.3.0