Enhanced OSD and Brushless support

• added support for Lite Brushless 1S (new version)
• rssi, failsafe state on flight screen
• channels setup via OSD menu
• username via osd menu
• minor improvements

Ready to race

This version can display some additional info on osd. It is possible to add username on screen via config file. Also ibus support and rainbow leds included. For osd see corresponding release in separate repo