Add Disk Arbitrator (cugu#15)

README.md

@@ -132,6 +132,7 @@ Curated list of awesome **free** (mostly open source) forensic analysis tools an
 ### Disk image handling
 
 - [aff4](https://github.com/google/aff4) - AFF4 is an alternative, fast file format
+- [Disk Arbitrator](https://github.com/aburgh/Disk-Arbitrator) - A Mac OS X forensic utility designed to help the user ensure correct forensic procedures are followed during imaging of a disk device
 - [imagemounter](https://github.com/ralphje/imagemounter) - Command line utility and Python package to ease the (un)mounting of forensic disk images
 - [libewf](https://github.com/libyal/libewf) - Libewf is a library and some tools to access the Expert Witness Compression Format (EWF, E01)
 - [xmount](https://www.pinguin.lu/xmount) - Convert between different disk image formats