Added dialog-info application (RFC4235)

Ignore-this: 1bfbbf138de79678b0d5620d29b6103e

darcs-hash:20091231171227-56b4d-63a75d2db139156e82bed5ae5135b036698b5460
Updated applications README

Ignore-this: c74655468e1425c03f6232b251f9dc22

darcs-hash:20091231172108-56b4d-f5f29c7fe7a5834c8e34ec57a2062ead68e02961