Caching support for Response

[srikanthps]

There was an issue reported in Stack Overflow by an user that Response object cannot be cached using Rails::Cache.

Following error is reported

ERROR -- : Marshalling error for key 'Timeline:weather_by_woeid/26352062': no _dump_data is defined for class Nokogiri::XML::NodeSet
ERROR -- : You are trying to cache a Ruby object which cannot be serialized to memcached.
ERROR -- : /var/lib/gems/2.2.0/gems/dalli-2.7.4/lib/dalli/server.rb:402:in `dump'

Here is the link to Stackoverflow issue: http://stackoverflow.com/questions/31916816/how-to-cache-weather-nokogirixmlnodeset-object-in-memcache