Site updates 0.154

Created 5/5/2015, updated 6 weeks ago

dac346d Add initial version of TagMapping
a5c6063 Implement "soft" tag redirects in TagsController
c6f2ee8 Implement TagMapping.canonicalize!
d6dfe1d Improve TagMapping docs
560f773 Commit TODOs
bf14a9f Update vendor/cache, which had fallen out of sync
ac23e52 Kill off some unused CSS
f60e229 Add a clarifying comment to ArticleObserver
9c5184a Add a Clipper link to the product nav
48690f9 Add a TODO missed in previous sweep
f370dbe Likely fix for Spring-woes
c43676e Update Browserify bundle

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