Added analytics field with get/setters
Added analytics field to the form type using text as type
Added analytics field. Type is string, nullable=true as its not required
Added includeAnalyticsTracking method to include GoogleAnalytics to footer of frontendbundle when the analytics field has a value
Added fieldset to include the analytics form field
Added google analytics to the page footer when general settings analytics field has a value
Adds analytics field to general settings (hopefully)