Bump release version for '0.5.4'
log: Add notes for Sunday
util: Don't escape slashes in JSON responses

The only reason you'd want to do this is if you're embedding the JSON
inside of an HTML page, see:

    http://stackoverflow.com/questions/1580647/json-why-are-forward-slashes-escaped

Issue #304.
Merge branch 'issue/304' into release/0.5.4
Merge branch 'release/0.5.4'