Catmandu::CQLSearchable pod example sru_sortkeys is wrong?

[phochste]

Shouldn't it be something like title,,0 ?

It would be helpfull to have these sru_sortkeys and a reference to Catmandu::CQLSearchable also in Catmandu::Searchable pod

[nics]

title is also valid I think, everything after the first argument gets replaced by the default if it's missing. But I changed the example since it illustrates sru syntax more clearly. I added a section about CQL to the Searchable pod.
Commits:
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