Parameterize Category labels in paths instead of escaping them

[morgant]

In the initial implementation of Comfy::Archive::IndexController#index I was lazy and just used CGI::unescape so that it was an easy #for_category query. The view just does a CGI::escape on the Comfy::Cms::Category#label (from Comfy::Archive::Index#categories) to encode them, but that results in paths like /blog/category/In+the+News. The labels should really be encoded with String#parameterize to be consistent with how Rails & ComfortableMexicanSofa build paths & URLs.

[morgant]

My thought is to approach this one of two ways:

• Add a Comfy::Archive::IndexController method to find matching Comfy::Cms::Categories by fetching all of the categories, then doing a basic Array#find on the parameterized label.
• Extend the Comfy::Cms::Category to add a slug field, like Comfy::Cms::Page has, and then query by that in Comfy::Archive::IndexController.

The first seems easiest to maintain, but may not be particularly performant on sites with lots of categories. The latter would be far more performant, but I'm a little wary of adding & maintaining additional columns for models in ComfortableMexicanSofa.

Either way, I should make this optional via a config option to ease transitions for anyone relying on the current implementation (esp. since ComfyBlog seems to have the same issue). I should also add some helper methods for generating the appropriate year/month & category archive links to simplify the views a bit.

[morgant]

I went with the simpler implementation and we can optimize later, as necessary. I have also added a new Comfy::ArchiveHelper with date & category link generation methods, the latter of which utilizes the new ComfyArchive.config.parmeterize_category config option.

[morgant]

My implementation also added other new functionality, specifically that the 404 error page is returned (or an exception thrown) if a matching Comfy::Cms::Category cannot be found. However, I realized that we're actually taking advantage of the old functionality internally, so I've added a new ComfyArchive.config.strict_categories option (defaults to true) to enable said new functionality, that we we can continue to abuse it.

[morgant]

All tests pass and this is working well in our internal testing.