Fixed references to PRs in schema.sql
Merge pull request #2748 from gratipay/fix-pr-reference-in-schema

Fixed reference to PR in schema.sql
fix empty <h2>
Merge pull request #2751 from gratipay/fix-empty-h2

Fix empty <h2>
Totally hack in a rough authenticated homepage

Talking with seanlinsley irl about this. Will say more in PR ...
fill in the actual giving/receiving numbers
switch to a 2-column layout
tweak a couple of margins/paddings
refactor team and community listings
develop the receiving section
tweak a few more margins/paddings