Upgrade ring from 1.3.1 to 1.3.2.

Fixes #135.
Display 404 page instead of NPE stacktrace page.

Displays a 404 if no update was found for the given ID instead of
throwing a NullPointerException.

Fixes #145.
Only accept numbers as ID.

Displays a 404 instead of a NumberFormatException.

Relates to #145.
Merge pull request #141 from mvitz/135-fix-statuses-redirect

Upgrade ring from 1.3.1 to 1.3.2.
Merge pull request #146 from mvitz/145-npe-for-not-used-id

Fixes #145 by displaying 404 page instead of stacktrace page.
Refactor info page into own namespace.
Refactor too-long page into own namespace.
Add separate namespaces for routes and html layouts.
Only views depends on hiccup now.
Move default layout from common to layout namespace.
Increase usage of routes namespace.
Fix styling and some minor warnings from kibit.