Adding asm & hack samples

Those are the examples and the asm & hack (assembled) from the project 6 of
nand2tetris

asm-samples/RectL.asm

@@ -0,0 +1,33 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/6/rect/RectL.asm
+
+// Symbol-less version of the Rect.asm program.
+// Designed for testing the basic version of the assembler.
+
+@0
+D=M
+@23
+D;JLE 
+@16
+M=D
+@16384
+D=A
+@17
+M=D
+@17
+A=M
+M=-1
+@17
+D=M
+@32
+D=D+A
+@17
+M=D
+@16
+MD=M-1
+@10
+D;JGT
+@23
+0;JMP