* User reportlab to render the submissions into pdf

* Improve layout and look of submissions and pdfs
This makes headings render smaller than the questions within rich text fields

* Enable h1 tag in bleach
Based on changes to how headings are rendered this is now more reasonable.

This reverts commit 630cc0ab.

Implement -text-line-length set to 50em for submission and comments. Wrap tables in a div and set overflow auto it. Set break-word on comments to break long urls etc.