cmd/geth, cmd/utils, core, rpc: renamed to blockchain

* Renamed ChainManager to BlockChain
* Checkpointing is no longer required and never really properly worked
when the state was corrupted.

cmd/geth/blocktestcmd.go

@@ -118,7 +118,7 @@ func runOneBlockTest(ctx *cli.Context, test *tests.BlockTest) (*eth.Ethereum, er
 		return ethereum, fmt.Errorf("InsertPreState: %v", err)
 	}
 
-	cm := ethereum.ChainManager()
+	cm := ethereum.BlockChain()
 	validBlocks, err := test.TryBlocksInsert(cm)
 	if err != nil {
 		return ethereum, fmt.Errorf("Block Test load error: %v", err)

cmd/geth/js_test.go

@@ -196,7 +196,7 @@ func TestBlockChain(t *testing.T) {
 	tmpfile := filepath.Join(extmp, "export.chain")
 	tmpfileq := strconv.Quote(tmpfile)
 
-	ethereum.ChainManager().Reset()
+	ethereum.BlockChain().Reset()
 
 	checkEvalJSON(t, repl, `admin.exportChain(`+tmpfileq+`)`, `true`)
 	if _, err := os.Stat(tmpfile); err != nil {

cmd/geth/main.go

@@ -48,7 +48,7 @@ import (
 
 const (
 	ClientIdentifier = "Geth"
-	Version          = "1.2.0"
+	Version          = "1.2.0-dev"
 	VersionMajor     = 1
 	VersionMinor     = 2
 	VersionPatch     = 0