Support 256 colours in the terminal

src/freedombone-utils-setup

 # Default diffie-hellman key length in bits
 DH_KEYLENGTH=2048
 
+function support_256_colours {
+    if ! grep 'xterm-256color' /etc/skel/.profile; then
+        echo '' >> /etc/skel/.profile
+        echo 'export TERM=xterm-256color' >> /etc/skel/.profile
+    fi
+
+    if ! grep 'xterm-256color' /home/$MY_USERNAME/.profile; then
+        echo '' >> /home/$MY_USERNAME/.profile
+        echo 'export TERM=xterm-256color' >> /home/$MY_USERNAME/.profile
+    fi
+}
+
 function detect_usb_drive {
     # sets to the highest available drive letter
     # which is likely to be the last drive connected
     function_check remove_management_engine_interface
     remove_management_engine_interface
 
+    function_check support_256_colours
+    support_256_colours
+
     function_check enable_predictable_device_names
     enable_predictable_device_names