Support initiating DSM bind via QGroundControl

Kconfig cleanup

Fix bug where IO was in override mode for copter 

Fix handling of board config files. Treat CONFIG_BOARD like CONFIG_ARCH in the toolchain configuration.

Fixed log conversion scripts copy operation. Each log comes now with the required conversion tools. Eats up only 10 KB flash for the good cause.

NuttX is confused when it doesn't know what board it's building for - since we don't tell it in the config anymore, we need to pass it a hint.

Final version of log conversion script, runs with Python 2 or 3 on Windows, Linux and MacOS. Tested on Mac with 2 and 3

Add a 'menuconfig' target that makes it possible to use the NuttX menuconfig tool on the PX4 config files.

Added Python 2 / 3 Windows / Linux / Mac OS converter script. So much for cross-platform / version agnostic

Segway Controller 

These values work better

this allows for apps to ask for slightly higher filters with the
software filter and not have it completely ruined by the on-chip DLPF