Get hard coded specific content into the database

[arthurlutz]

In parts of the code, there are URLs, pieces of text, images etc that are specific to betweenthebars.org, these should migrate to the database and be editable there.

Here is the beginning of a list, we can discuss other occurrences in the comments

• about/about_base.html contains hard coded URLs, make them configurable
• about/index.html div with link to civi.mit.edu
• about/index.html images at top of the page
• about/privacy.html content
• about/faq.html content
• tex files in templates/correspondence/ ?

[arthurlutz]

links to news.betwenthebars.org ( and crm.) and various places the email address info@betweenthebars.org