Easy hexdump to stdout or as an iterator.
# Example
```
extern crate hexdump;
hexdump::hexdump(b"12345\0\r\n\t .abcdef");
```
prints
```text
|31323334 35000d0a 09202e61 62636465| 12345.... .abcde 00000000
|66| f 00000010
00000011
```