Addlw instruction (#4)

* Added addlw command

* Write to program list

* Included CommandUtils as helpter class. Sorted classes into packages

* Revert changes on HelloWorld

* Revert "Revert changes on HelloWorld"

This reverts commit a08a336864fb2aa2bbc5a4e37ca360765774965e.

* Added example execution of Addlw command

HelloWorld.java

@@ -1,7 +1,14 @@
+import commands.Command;
+import decoder.CommandDecoder;
 
+import java.util.ArrayList;
 
 class HelloWorld {
     public static void main(String[] args) {
-        System.out.println(Parser.parser("TPicSim2.LST"));
+        //System.out.println(Parser.Parser.parser("TPicSim2.LST"));
+        ArrayList<Command> program = new ArrayList<>();
+        int input1 = 0x3EFF;
+        program.add(CommandDecoder.decode(input1));
+        program.get(0).execute();
     }
 }