Add Diskattrmap, Scsiattrmap for probed scsi devices

Additional changes

- Use ``iota`` for constants
- Remove unncessary C header files
- ``new-cmd`` now depends on codegangsta cli

pkg/strbyteconv/strbyteconv.go

@@ -25,11 +25,12 @@ import (
 )
 
 const (
-	UNIT_BYTE     = 1
-	UNIT_KILOBYTE = 1024 * UNIT_BYTE
-	UNIT_MEGABYTE = 1024 * UNIT_KILOBYTE
-	UNIT_GIGABYTE = 1024 * UNIT_MEGABYTE
-	UNIT_TERABYTE = 1024 * UNIT_GIGABYTE
+	UNIT_BYTE = 1 << (10 * iota)
+	UNIT_KILOBYTE
+	UNIT_MEGABYTE
+	UNIT_GIGABYTE
+	UNIT_TERABYTE
+	UNIT_PETABYTE
 )
 
 func BytesToString(bytes uint64) string {