Update to rails 3.2.13
Work around JSON encoding issue in rails 3.2.13
Reworked changeset list layout
Display a map showing features mentioned in a diary entry

Scan diary entry body for osm feature refs, and display map
browse.js can now handle a list of features.
Add iD editor

iD sources live in vendor/assets/iD, and are managed with
vendorer, using the "rewrite" functionality to replace relative
paths in the CSS with <%= asset_path(…) %> directives.

To avoid needing to namespace all of its CSS classes, iD
is embedded via an iframe.

To setup, edit application.yml to include an `id_key` key.
(It can use the same consumer key as P2 if you like.)
Update iD; clean up OAuth configuration