fix bug 1085623 - reorg Socorro docs

r? anybody - I know @lonnen is interested, maybe if @erikrose could take a look (it's inspired by DXR's excellent docs)
Following up on [my comment](https://github.com/mozilla/socorro/pull/2450#issuecomment-60368331), it occurs to me that this might just be an errant link.  i.e. instead of linking to section `6.8.13.1`, you meant it to link to section `1.1`

Clarification?