Update newrelic.ini config to use heroku config vars

Using https://devcenter.heroku.com/articles/newrelic#node-js-agent-on-heroku as a guide, this seems like the thing to do.

Additional new relic should be put in code and should use the extra.heroku.php-includes option in composer.json
Disable automatic cache invalidation of opcache

This is not needed because files can not change without a deploy, and on deploy the server
gets restarted anyway which clears the cache.
Disable opcache.fast_shutdown. Fixes #84
Added quick docs about ext- requirements
Add default log paths for CakePHP applications
Merge pull request #102 from josegonzalez/cakephp-logs

Add default log paths for CakePHP applications
Added a timezone by default

All PHP date functions are triggering a warning if the timezone is not defined. The default config should allow having a working setup.
Merge pull request #104 from stof/patch-1

Added a timezone by default
Add v0.3.6 changelog
Merge branch 'development'
Improved the nginx config to support SSL endpoints

Given the SSL endpoint is handled by heroku, the $https variable needs to be set based on the forwarded proto set by the heroku load balancer.
Removed the explicit disabling of HHTP in symfony2

The HTTPS fastcgi param is set by the default NGinx config since 1.1.11 based on $https.
Merge pull request #105 from stof/patch-2

Improved the nginx config to support SSL endpoints
Use official repo of pecl/memcache
Update the Readme

* Updating the default versions for NGinx and PHP
* Removed an outdated note about the user-env-compile lab feature
* Added a note about ext requirements needing to be in the root package. Ref #97
Merge pull request #108 from stof/patch-1

Update the Readme
Fix the memcache revision
memcache: fix build script
Merge branch 'master' into development
Add note about using FriendsOfCake/app-template for repo layout