Autostart cleanup

This is major init scripts and autostart cleanup. Try to move all code from 1234_xxx scripts, except setting default parameters and environment variables. Each autostart script should mean: "Quad X, with or without IO, with PWM outs, disarmed 900, min 1000, max 2000". rcS should do the rest work: configure PX4IO, mavlink, start apps.

WIP, only 4010 (F330) and 1001 (Quad HIL) implemented now. Non-PWM outputs can be handled with some env variables.