Added Intro To Redbrick 2018 slides

[gruunday]

Closes #

Description

Checklist

I confirm that before I submitted this pull request I did the following:

• [X] Confirmed that no other open PRs address this issue.
• [X] Checked out the latest version of the site.
• [X] Ran yarn start and confirmed that there were no issues.
• [X] Annotated my code with the relevant license information (if applicable).