created devoxxfr crawler
fix some comments in VoxxrinCrawler
referencing new devoxxfr crawler
lowercased most of the ids since serverside doesn't handle uppercased names
logging number of queries and failures
remembering day on every slot
fixed slot ids : we shouldn't append options.prefix and consider
using s.slotId instead of breakId in order to avoid duplicate ids for breaks
like "dej"
Providing user-agent on every request because devoxxfr server
consider it as mandatory
Fixed event.id overriding
not sending initialCrawlingUrls to serverside
replacing _ by - in prez id ("_" not supported by server)