32bit load and store intrinsics

[cakemaster9001]

Added 32bit load and store intrinsics with the same scheema as the 64 and 8-bit versions.
The intrinsics work both in simulation and if they are compiled.

The functions were tested by the following program:

include "std.porth"

//prints 0
mem 0 .32
mem ,32 print

//prints 255
mem 255 .32
mem ,32 print

//prints 256
mem 256 .32
mem ,32 print

//prints 65535
mem 65535 .32
mem ,32 print

//prints 65536
mem 65536 .32
mem ,32 print

//prints 4294967295
mem 4294967295 .32
mem ,32 print

//prints 0
mem 4294967296 .32
mem ,32 print