hiddenSuffix crashes Ruby on Rails / Rack servers

[harmdewit]

I'm using Pickadate in a Rails app. Everything works fine but when i use the hiddenSuffix value the app crashes on certain servers.

Thin returns the error !! Unexpected error while processing request: expected Hash (got String) for paramdate'` and Pow server (http://pow.cx/) crashes entirely.

Apperently most ruby servers can handle form value names like this name="neighborhood_post[content]" but not name="neighborhood_post[content]_hidden"

An option to fix this issue for Ruby apps would be an hiddenPrefix option so that I get name="hidden_neighborhood_post[content]"

[candidosales]

Thanks =D