update VCR response headersto match new format from enrico

enrico changes to the API:
Version 1.1.5
Date: 29 Nov 2013
Description: Using HTTP header "Content-Type application/json" for JSON
and "Content-Type application/javascript" for JSONP. Fixing format
error in JSON response (year value was enclosed in double quotes).
make sure we use correct year to pass tests
we do not need to (double) parse HTTParty::Response due to changes/improvements in the enrico API

enrico changes to the API:
Version 1.1.5
Date: 29 Nov 2013
Description: Using HTTP header "Content-Type application/json" for JSON
and "Content-Type application/javascript" for JSONP. Fixing format
error in JSON response (year value was enclosed in double quotes).