Make lookup tables static const.

I don't see the need to keep them in RAM.

Changes to be committed:
	modified:   lib-Mini51/hal/lib_fp.c
	modified:   lib-Mini51/hal/lib_fp.h
Change control parameters

The control parameters are closer to the original firmware.
Very slow lift-off and flying close to the ground are now possible.

P increased, D increased, I decreased, I limit decreased

The integral part of PID is now nearly disabled.

Changes to be committed:
	modified:   src/bradwii.c
	modified:   src/config_X4.c
Update README for new control parameters

Changes to be committed:
	modified:   README.md