Update hid.h 2014-04-01

If you get this error:
$ make
g++ -c -Iinclude main.cpp
gcc -c -Iinclude uinput_device.c
gcc -c -Iinclude hid.c
hid.c: In function ‘read_hid_event’:
hid.c:233:2: error: unknown type name ‘fd_set’
fd_set rfds;
^
make: *** [hid.o] Error 1

You just need change hid.h to include sys/select.h.
It can be done adding this line:
#include
before
#include
in include/hid.h file.