changed so that invalid paramaters are not treated as hard errors, as th...

...ey can be caused by crawlers malformed links etc, and instead inform the user.
https://code.google.com/p/otwarchive/issues/detail?id=3919&thanks=3919&ts=1392660704
https://rpm.newrelic.com/accounts/115892/applications/190034/traced_errors/1005876650?original_error_id=1006005701

https://code.google.com/p/otwarchive/issues/detail?id=3933
Oops, it looks like another pull request fixed this for the series controller, which is probably why this one is greyed out (not automatically mergeable).

If/when you address the comments on the other file, would you also revert the changes to the series controller, please?