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/erasure/encode.go

@@ -33,7 +33,7 @@ import (
 
 const (
 	VANDERMONDE = iota
-	CAUCHY      = iota
+	CAUCHY
 )
 
 const (