Fix recordings

LWP::Protocol::PSGI needs to be 0.04; otherwise, it only records the first of the request/response pairs, as discussed in #65. 

    cpanm MIYAGAWA/LWP-Protocol-PSGI-0.04.tar.gz

Also, once the recordings are made, I was running into issues where the stringified versions of the request/response pairs were out of order, but still equal. I found a way to check if they're deeply_equal using Storable::Freeze.

Does Storable need to be in the dist.ini? It's a core module, but some of the other reqs in there are also core modules.