Added Google Analytics and Core Metrics from old site

Copied code verbatim from

https://github.com/rackerlabs/devsite/blob/master/source/index.html#L1106-1130
Merge pull request #456 from everett-toews/analytics

Added Google Analytics and Core Metrics from old site
Revert "Added Google Analytics and Core Metrics from old site"
Merge pull request #460 from rackerlabs/revert-456-analytics

Revert "Added Google Analytics and Core Metrics from old site"
Merge branch 'master' of github.com:rackerlabs/developer.rackspace.com
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge pull request #485 from rackerlabs/master

Merging dev -> master via PR