Added sample program, fixed maven packaging of resources, updated README

samples/hello.asm

@@ -0,0 +1,20 @@
+;;
+;; Output the string 'Hello, World!'
+;;
+
+
+.alias cr  $0d
+.alias lf  $0a
+
+.alias out $c000
+
+.org $0300
+
+start:  ldx #$00
+loop:   lda string,x
+        beq start      ; If A is 0, loop back and start again
+        sta out        ; Otherwise, store into output
+        inx            ; Increment X
+        jmp loop       ; Repeat.
+
+string: .byte "Hello, 6502 world! ", 0