Insert New Relic page load timing scripts

For some reason, the automatic injection fails on v2, so we need to put
it in manually. v1 works without manual setup.
See:
https://docs.newrelic.com/docs/agents/php-agent/features/page-load-timing-php#manual_instrumentation
Make sure New Relic browser instrumentation does not get deferred by Pagespeed
Nooku Platform update
Merge branch 'master' into staging