Add a utility RenderTemplate function.
Add a utility RenderTemplate function.

This may need a bit of code review to get the right abstraction,
but should be a good first pass.

Danzibob/2016-site,UniversityRadioYork/2016-site,Danzibob/2016-site,UniversityRadioYork/2016-site,Danzibob/2016-site,UniversityRadioYork/2016-site