New settings to cutomize how bytes data are displayed

[pfayolle]

Fixes #25

Added two new settings that the user can set with the "set" command:

• byte_data_display_mode list ou hexdump:
  • list: The bytes will be displayed as a python list (e.g. [0x01, 0x02, 0x03])
  • hexdump: The bytes will be displayed using a hexadecimal dump format, similar to the output of the xxd command
• byte_data_max_len: The maximum number of bytes to display for either display mode. Set this to 0 to remove the limit and display all bytes.

[nvincent-vossloh]

Could you please add markdown documentation regarding this new option.