added the requestMaxSize option
check that we get a content-length header
make sure we always send back json errors
added 404 handling
make sure the limit option really works
added a test for the 500
not specifying an errno for 404
Comment on 404 handler.
Fix #53 — Use API error format as for FxA.
Remove connect-validation
@tarekziade review.
Merge pull request #76 from mozilla-services/request-validation

Handle 500/404, empty Content-Length and requestMaxSize with JSON error messages.