The url callbacks are called for EVERY ecore_con usage, object_from_instance
can fail in case the Url is not generated from us (for example an elm Image that
load the data from the net). So just ignore those events.
It's now super easy to perform various network task in a full efl fashion.
Implemented "Lookup" for dns query and "Url" to perform http requests.
"Server" will come soon.
Comes with quite complete docs, examples and unit tests