Enable recaptcha for contact_us form: fixes #501
Enable recaptcha for contact_us form: fixes #501

DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,CDLUC3/roadmap,DigitalCurationCentre/roadmap,CDLUC3/roadmap,CDLUC3/dmptool,CDLUC3/roadmap,CDLUC3/dmptool,CDLUC3/dmptool,DMPRoadmap/roadmap,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/roadmap