[release/1.3.4] core, core/vm, crypto: fixes for homestead

* Removed some strange code that didn't apply state reverting properly
* Refactored code setting from vm & state transition to the executioner
* Updated tests

Conflicts:
	common/registrar/ethreg/api.go
	core/tx_pool.go
	core/vm/jit_test.go

miner/worker.go

@@ -590,7 +590,8 @@ func (self *worker) commitUncle(work *Work, uncle *types.Header) error {
 func (env *Work) commitTransactions(transactions types.Transactions, gasPrice *big.Int, bc *core.BlockChain) {
 	gp := new(core.GasPool).AddGas(env.header.GasLimit)
 	for _, tx := range transactions {
-		// We can skip err. It has already been validated in the tx pool
+		// Error may be ignored here. The error has already been checked
+		// during transaction acceptance is the transaction pool.
 		from, _ := tx.From()
 
 		// Check if it falls within margin. Txs from owned accounts are always processed.