Moved logging to state, proper structured block

* Moved logs to state so it's subject to snapshotting
* Split up block header
* Removed logs from transactions and made them receipts only

ethstate/log.go

@@ -0,0 +1,38 @@
+package ethstate
+
+import "github.com/ethereum/go-ethereum/ethutil"
+
+type Log struct {
+	Address []byte
+	Topics  [][]byte
+	Data    []byte
+}
+
+func NewLogFromValue(decoder *ethutil.Value) Log {
+	log := Log{
+		Address: decoder.Get(0).Bytes(),
+		Data:    decoder.Get(2).Bytes(),
+	}
+
+	it := decoder.Get(1).NewIterator()
+	for it.Next() {
+		log.Topics = append(log.Topics, it.Value().Bytes())
+	}
+
+	return log
+}
+
+func (self Log) RlpData() interface{} {
+	return []interface{}{self.Address, ethutil.ByteSliceToInterface(self.Topics), self.Data}
+}
+
+type Logs []Log
+
+func (self Logs) RlpData() interface{} {
+	data := make([]interface{}, len(self))
+	for i, log := range self {
+		data[i] = log.RlpData()
+	}
+
+	return data
+}