Add nunes gem - log data from rails instrumentation to statsd

Here's an example of what gets logged when we perform a search:

``2014/03/27 11:13:34 Received: frontend.action_view.template.app_views_search_results_index_with_results_html_erb:46|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_mobile_nav_html_erb:0|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_primary_nav_html_erb:10|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_search_box_html_erb:1|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_header_html_erb:16|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_footer_site_links_html_erb:12|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_social_links_html_erb:0|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_footer_social_links_html_erb:2|ms
2014/03/27 11:13:34 Received: frontend.action_view.partial.app_views_shared_footer_html_erb:16|ms
2014/03/27 11:13:36 Received: frontend.action_view.template.app_views_layouts_base_html_erb:1728|ms
2014/03/27 11:13:36 Received: frontend.action_view.template.app_views_layouts_application_html_erb:1764|ms
2014/03/27 11:13:36 Received: frontend.action_controller.runtime.total:1878|ms
2014/03/27 11:13:36 Received: frontend.action_controller.runtime.view:1819|ms
2014/03/27 11:13:36 Received: frontend.action_controller.runtime.db:0|ms
2014/03/27 11:13:36 Received: frontend.action_controller.format.html:1|c
2014/03/27 11:13:36 Received: frontend.action_controller.status.200:1|c
2014/03/27 11:13:36 Received: frontend.action_controller.controller.SearchResultsController.index.runtime.total:1878|ms
2014/03/27 11:13:36 Received: frontend.action_controller.controller.SearchResultsController.index.runtime.view:1819|ms
2014/03/27 11:13:36 Received: frontend.action_controller.controller.SearchResultsController.index.runtime.db:0|ms
2014/03/27 11:13:36 Received: frontend.action_controller.controller.SearchResultsController.index.format.html:1|c
2014/03/27 11:13:36 Received: frontend.action_controller.controller.SearchResultsController.index.status.200:1|c``