Shift data.txt into lib folder for better deployment of jar files

lib/data.txt

@@ -0,0 +1,4 @@
+todo eat
+false
+event drink /at home
+false

src/main/java/META-INF/MANIFEST.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: duke.Duke
+

src/main/java/duke/Data.java

@@ -18,7 +18,7 @@ public class Data {
 
  public Data() throws FileNotFoundException {
  this.todos = new ArrayList<Todo>();
- File f = new File("src/main/java/duke/data.txt");
+ File f = new File("lib/data.txt");
 
 
  // Adapted from https://nus-cs2113-ay1920s2.github.io/website/schedule/week6/topics.html
@@ -59,10 +59,10 @@ public static void newTask(String cmd) throws DukeException {
  if (cmd.isEmpty()) {
  throw new DukeException("Please type something.");
  }
- if (cmd.substring(0, 6).equals("delete")) {
- todos.remove(Integer.parseInt(cmd.substring(cmd.indexOf(" ")+1))-1);
+ if (cmd.contains("delete")) {
  System.out.println(" Noted. I've removed this task:");
  System.out.println(" " + todos.get(getSize() - 1));
+ todos.remove(Integer.parseInt(cmd.substring(cmd.indexOf(" ")+1))-1);
  System.out.println(" Now you have " + getSize() + " tasks in the list.");
  } else {
  if (!cmd.contains(" ") && cmd.length() > 0) {
@@ -124,7 +124,7 @@ public String getDescription(int i) {
  return todos.get(i).getDescription();
  }
  public void saveToFile() throws IOException {
- FileWriter fw = new FileWriter("src/main/java/duke/data.txt");
+ FileWriter fw = new FileWriter("lib/data.txt");
  for (Todo todo : todos) {
  String description = todo.getDescription();
  boolean isDone = todo.isItDone();