for 0.6:
* Add sensible record updating API
-* add wide area support (i.e. DNS-SD over unicast DNS)
* add subtype browsing
+* add wide area support (i.e. DNS-SD over unicast DNS)
* remove queries from queue if the browse object they were issued from is destroyed
* if two local clients browse for the same RRs, only send out query series once
* add a way to notify the user that all cache entries have been read when browsing
* release 0.2!
* add identical service detection cookie
* add API to detect if a service is local
+* make AVAHI_PROTO_xxx well defined constants