v0.4 bootloader / BIST firmware release

This release adds a few fixes and improvements:

• Compacted networking code
• Slight speed improvement of UDP packet bursts
• Enabled network discovery: running 'netpp' shows all listening netpp nodes attached to the LAN.
• Boot mode, firmware upgrade and defaults reset option (SW2) improved.

Property Changes:

• SysCtrl.Reboot no longer evaluates argument. You must now set SysCtrl.BootMode prior to issuing Reboot.