Use 500 error response to indicate error
Report error if error raised whilst requesting dataset
More error handling in addDataset
Add jquery.min.js to vendor'd javascript
Further error handling in Box.create
Change wording of rate limiting
Merge pull request #581 from scraperwiki/custard-error-handling-fixes

Improved error handling
Merge pull request #583 from scraperwiki/vendor-jquery

Add jquery.min.js to vendor'd javascript
Prevent 404's from being returned as 200s
Move routes into /shared/
Fix for routing difference of backbone and express

Express matches "/url/" against its routes, whereas backbone
is "url/", i.e, no leading slash. So we insert it when using
the routes.