Add compatibility with baseurl tag

[AlexVerrico]

Hi @samarsault I have made the following changes to this theme to make it compatible with the tag baseurl:

• Added a section to the README describing how to use the baseurl tag (minor change)
• Marked links in _layouts/default.html as relative URLs (meaning that they will have the value of baseurl prepended to them) (minor change)
• Changed from including assets/js/search.js as an external script to embedding it in _layouts/default.html to allow for the value of baseurl to be prepended to the path to search.json (major change)

Cheers, Alex.

[samarsault]

Thanks @AlexVerrico! This is, indeed, a much needed feature. I've made some comments, and once those are resolved this should be good to go.

[AlexVerrico]

@samarsault I have addressed both of your comments

[samarsault]

Also, please squash your commits.

[AlexVerrico]

Hi @samarsault I have made the changes that you suggested in your comments. Regarding squashing the commits, there is normally an option for you to do that when you merge this branch into master. Cheers, Alex.

[samarsault]

Looks great, thanks!