* in Settings->Network, added setting of Identifier, defaulted to "My Podcini"
* Added send/receive catalog feature across devices:
	* a catalog is a list of feeds info but no episodes
	* on receiving, the catalog is put in a volume with the sender's identifier
	* to receive, in Library menu, choose "Receive contents", select "Catalog" in the popup (likewise for receiving feed), tap Start
	* to send, in Library menu, choose "Send catalog", tap Send
* startup crash should be fixed
