Since v1.6:

- New var `nhexl-nibble-edit-on-click' to auto-activate
  `nhexl-nibble-edit-mode' after mouse clicks in the hex area.
- Actually obey `nhexl-nibble-copy-hex'.

Since v1.5:
- New var `nhexl-nibble-copy-hex' to allow kill operations to copy
  the hex form when in nibble mode.
- Support for `hl-line-mode'.