Hypothesis template - HTML + CSS [LACE]

[nfreear]

Hi Martin,

This issue is to help document that I've put the hypothesis template for LACE into Git, and I'm taking CSS out of the template and putting it into style.css. Also working on semantics/headings — particularly for print/ RTF export/ accessibility.

• Template: IET-OU/oer-evidence-hub-org .../page-templates/hypothesis-template-LACE.html
• A previous commit: https://github.com/IET-OU/wp-evidence-hub/commit/274b215585c9e82974f40a97dd824755c3e586a5
• Relates to: https://github.com/IET-OU/oer-evidence-hub-org/issues/42