Add fmpz_inp_raw & fmpz_out_raw along with document and test.
Besides, fixed the compile bug by editing fmpz/is_prime_pseodosqure.c

	modified:   fmpz.h
	modified:   fmpz/doc/fmpz.txt
	new file:   fmpz/inp_raw.c
	modified:   fmpz/is_prime_pseudosquare.c
	new file:   fmpz/out_raw.c
	new file:   fmpz/test/t-out_inp_raw.c
Merged Qingwen GUAN's fmpz_inp/out_raw functions.