LogPayload now includes all skynet.ServiceConfig data

MongoDB logs now look like this:

```
{
        "_id" : ObjectId("509c11b20ba9f74243671b30"),
        "level" : "fatal",
        "message" : "New panic 20",
        "level_index" : 5,
        "name" : "main.dummy",
        "pid" : 24319,
        "time" : ISODate("2012-11-08T20:10:26.907Z"),
        "host_name" : "hexcore",
        "tags" : [ ],
        "uuid" : "abc123",
        "duration" : NumberLong(0),
        "thread_name" : "",
        "application" : "",
        "payload" : null,
        "exception" : {
                "name" : "",
                "message" : "New panic 20",
                "stack_trace" : [
                        "/home/steve/dpc/skynet/client/skynet/semantic_logger.go:79 _/home/steve/dpc/skynet/client/skynet.(*LogPayload).SetException()\n",
                        "/home/steve/dpc/skynet/client/skynet/mongo_logger.go:85 _/home/steve/dpc/skynet/client/skynet.(*MongoSemanticLogger).Fatal()\n",
                        "/home/steve/dpc/semantic_logger-example-new-api.go:77 main.dummy()\n",
                        "/home/steve/dpc/semantic_logger-example-new-api.go:72 main.fatalRunner()\n",
                        "/home/steve/dpc/semantic_logger-example-new-api.go:60 main.main()\n",
                        "/home/steve/Dropbox/programming/go/src/pkg/runtime/proc.c:244 runtime.main()\n",
                        "/home/steve/Dropbox/programming/go/src/pkg/runtime/proc.c:271 runtime.goexit()\n"
                ]
        },
        "service_config" : {
                "log" : null,
                "uuid" : "20af41b8-6f68-43a1-ab41-e20296bf0a4b",
                "name" : "",
                "version" : "unknown",
                "region" : "unknown",
                "serviceaddr" : {
                        "ipaddress" : "127.0.0.1",
                        "port" : 9000,
                        "maxport" : 9999
                },
                "adminaddr" : {
                        "ipaddress" : "127.0.0.1",
                        "port" : 9000,
                        "maxport" : 9999
                },
                "doozerconfig" : {
                        "uri" : "127.0.0.1:8046",
                        "booturi" : "127.0.0.1:8046",
                        "autodiscover" : true
                },
                "doozerupdateinterval" : NumberLong("5000000000")
        }
}
```