Correct name of FormatSuccess validator
Add error logging around save failure

By default data mapper just says that the save failed to happen. This is
not very helpful. This will now show why the error was thrown.
Upgrade datainsight_recorder

This contains, among other things, some very important daylight saving
fixes.
Merge pull request #9 from alphagov/add-error-logging

Add error logging and bump recorder gem
Merge pull request #7 from alphagov/method-name-switcheroo

Correct name of FormatSuccess validator
Add Gemfile.lock missed from earlier commit
Make save failure error reporting more robust

Be sure to log an error even if there are no extra details.
Fix tests for DST

With the DST support from datainsight_recorder 0.4.1 datetimes are in
local time for Europe/London.
Merge pull request #10 from alphagov/fix-for-dst

Fix tests for DST support in backdrop_recorder 0.4.1