Refactor website to use a template language

[ciaranRoche]

Currently, as the website grows, so does the amount of repetitive code header footer etc.

Refactoring the website to use a template language would make maintaining the website a lot easier and cut down on the amount of code used.

Example templating languages that would be worth researching - handlebars, ejs

[evanhearne]

@ciaranRoche currently working on the header part of this issue and it is completed, just waiting for approval by @laurafitzgerald. Hoping to work on the footer part tomorrow if header gets approved.

[ciaranRoche]

@evanhearne awesome, would you mind linking a PR to this work, I would be interested in having a look.

[evanhearne]

#71

[evanhearne]

@ciaranRoche that's the navbar integration I'm working on. It works by linking in a separate file that contains the navbar code and puts it directly on the website.