Refactored VM to two separate VMs; std & debug

Standard VM should be about 10x faster than the debug VM. Some error
checking has been removed, all of the log statements and therefor quite
some unnecessary if-statements.

ethutil/config.go

@@ -17,6 +17,7 @@ type ConfigManager struct {
 	Diff     bool
 	DiffType string
 	Paranoia bool
+	VmType   int
 
 	conf *globalconf.GlobalConf
 }