Display extra features on pricing page

It now shows which plans handle large PDFs, and allow more Twitter
followers. Really needs https://github.com/scraperwiki/twitter-follows-tool/issues/67
fixing before deploying.
Remove useless disk quota code
Further cleaning to mocha wrapper

Mocha gained a `--recursive` parameter, so we don't need to do a find
anymore. Now the only thing left to figure out is how to run the
cleaner, then we can eliminate the wrapper entirely. It's ugly.

I'm thinking maybe we could add a --require to mocha.opts to do it, but
I'm not sure how to deal with the async.

Care to weigh in @drj11?
s/.should.have.status/.statusCode.should.equal/g

The former syntax leads to extremely large error messages (many ~100s of
lines) in case of failure because it dumps the entire response object,
which contains a huge amount of stuff.

The new one gives a much more modest error message and makes my list of
26 errors much more comprehensible.
Merge pull request #606 from scraperwiki/quieter-test-failures

s/.should.have.status/.statusCode.should.equal/g
Page for upgrade for large PDFs
Update pricing.eco
Add to .gitignore
Merge pull request #611 from scraperwiki/large-pdfs-upgrade-page

Page for upgrade for large PDFs
Merge pull request #612 from scraperwiki/tell-more-on-pricing

Display extra features on pricing page
Merge pull request #602 from scraperwiki/simplify-mocha-wrapper

Further cleaning to mocha wrapper
Remove beta reference in code in browser help.
Remove beta reference in scraperwiki.coffee
add a Procfile for foreman
added instructions for using foreman
Remove "What's new?" link completely
Merge pull request #615 from scraperwiki/foreman

Foreman
robust error handling (for a tiny part of tests)
require that CU_BOX_SERVER is on https
Merge pull request #616 from scraperwiki/https-cobalt-dev

require that CU_BOX_SERVER is on https