Moved hellorld program to examples dir

examples/hellorld.mas

@@ -0,0 +1,25 @@
+counter, adr string
+one, dec 1
+
+string, chr h
+	chr e
+	chr l
+	chr l
+	chr o
+	chr r
+	chr l
+	chr d
+	hex a
+	hex 0
+
+// if the current character is zero, halt
+loopStart, loadi counter
+skipcond 800
+	halt
+
+// otherwise, output it, increment, and loop
+output
+load counter
+add one
+store counter
+jump loopStart