add 'should_cache' metadata checking in parser and wrapped mechanize and rest-client get requests within VCR block
updated gemfile to add VCR and fakeweb to default group since needed for handling cached requests.  added allow_http_connections_when_no_cassette = true to VCR for handling cases when caching is not enabled
added metadata DSL for should_cache
added cache example based on list example
Version bump to 2.2.0