core, cmd, vendor: fixes and database inspection tool (#15)

* core, eth: some fixes for freezer

* vendor, core/rawdb, cmd/geth: add db inspector

* core, cmd/utils: check ancient store path forceily

* cmd/geth, common, core/rawdb: a few fixes

* cmd/geth: support windows file rename and fix rename error

* core: support ancient plugin

* core, cmd: streaming file copy

* cmd, consensus, core, tests: keep genesis in leveldb

* core: write txlookup during ancient init

* core: bump database version

cmd/geth/main.go

@@ -204,6 +204,8 @@ func init() {
 		copydbCommand,
 		removedbCommand,
 		dumpCommand,
+		migrateAncientCommand,
+		inspectCommand,
 		// See accountcmd.go:
 		accountCommand,
 		walletCommand,