Optimise display of property values

• displays binary data in UTF-8 format
  • So that device-tree/manufacturer reports Apple Inc. instead of QXBwbGUgSW5jLgA= or 0x4170706C6520496E632E00
• displays numbers converted from NSData in little-endian
  • So that device-tree/clock-frequency reports 24000000 instead of 3567105