Wait at least 1 second between requests to the html validator
Lower the default number of concurrent jobs to 1
add a page_limit to the runs table
respect the page limit while processing the queue
respect a custom page limit when checking a site
send the page_limit along with the stats
make the logged status codes configurable
seperate total_bad_links into totals for each status code
provide queue position in stats
Merge remote-tracking branch 'upstream/master'