Implemented twitter summary cards for blog posts (#789)
Implemented twitter summary cards for blog posts (#789)

* Implemented twitter summary cards for blog posts

* Putting dynamic title in

swcarpentry/website,k8hertweck/website,rgaiacs/swc-website,rgaiacs/swc-website,ErinBecker/website,rgaiacs/swc-website,rgaiacs/swc-website,gvwilson/website,k8hertweck/website,k8hertweck/website,swcarpentry/website,swcarpentry/website,gvwilson/website,gvwilson/website,ErinBecker/website,ErinBecker/website,rgaiacs/swc-website,k8hertweck/website,gvwilson/website,swcarpentry/website,ErinBecker/website,gvwilson/website,swcarpentry/website,k8hertweck/website,ErinBecker/website