[release/1.3.4] parmas, crypto, core, core/vm: homestead consensus protocol changes

* change gas cost for contract creating txs
* invalidate signature with s value greater than secp256k1 N / 2
* OOG contract creation if not enough gas to store code
* new difficulty adjustment algorithm
* new DELEGATECALL op code

Conflicts:
	core/vm/environment.go
	crypto/crypto.go
	crypto/secp256k1/secp256.go
	eth/api.go

core/state/state_object.go

@@ -234,6 +234,11 @@ func (c *StateObject) Address() common.Address {
 	return c.address
 }
 
+// Sets the address of the contract/account
+func (c *StateObject) SetAddress(addr common.Address) {
+	c.address = addr
+}
+
 func (self *StateObject) Trie() *trie.SecureTrie {
 	return self.trie
 }
@@ -260,6 +265,13 @@ func (self *StateObject) Nonce() uint64 {
 	return self.nonce
 }
 
+// Never called, but must be present to allow StateObject to be used
+// as a vm.Account interface that also satisfies the vm.ContractRef
+// interface. Interfaces are awesome.
+func (self *StateObject) Value() *big.Int {
+	return nil
+}
+
 func (self *StateObject) EachStorage(cb func(key, value []byte)) {
 	// When iterating over the storage check the cache first
 	for h, v := range self.storage {

core/state/statedb.go

@@ -85,6 +85,18 @@ func (self *StateDB) GetLogs(hash common.Hash) vm.Logs {
 	return self.logs[hash]
 }
 
+func (self *StateDB) GetAllLogs() *map[common.Hash]vm.Logs {
+	copy := make(map[common.Hash]vm.Logs, len(self.logs))
+	for k, v := range self.logs {
+		copy[k] = v
+	}
+	return &copy
+}
+
+func (self *StateDB) SetAllLogs(logs *map[common.Hash]vm.Logs) {
+	self.logs = *logs
+}
+
 func (self *StateDB) Logs() vm.Logs {
 	var logs vm.Logs
 	for _, lgs := range self.logs {
@@ -93,6 +105,11 @@ func (self *StateDB) Logs() vm.Logs {
 	return logs
 }
 
+// TODO: this may not be the most proper thing
+func (self *StateDB) GetDB() ethdb.Database {
+	return self.db
+}
+
 func (self *StateDB) AddRefund(gas *big.Int) {
 	self.refund.Add(self.refund, gas)
 }