RestKit/RestKit — pull request #1240 by NachoMan (2013-02-17 17:02:14+00:00)
Title: Update was-modified code to check the HTTP status code, not the status string

Comparing against the string "304 Not Modified" doesn't work if you're working with a custom server that doesn't have pre-crafted response strings. This update allows RKHTTPRequestOperation to respond to the status code alone.