iforce.c split

[Johann D. <jo...@Do...>]

Hello,

I have to track down bugs in iforce.c code. As it was too big for me, I
split it into several files:
iforce-main.c: every exported functions from iforce.c
iforce-usb.c: usb-related code (ex: iforce-usb-xmit)
iforce-serio.c: serial-related code
iforce-packets.c: functions dealing with packets (send_packet,
                  dump_packet...)
iforce-ff.c: creation of force feedback packets.
iforce.h: header file common to all previously cited .c files

However, adding/removing files may break many things in Makefiles, and
maybe other parts of the tree. Therefore, I made my changes in another
branch, iforce-split.

-- 
Johann Deneux