Add parsingOptions to OpenSource

I have added the new parsing methode ParsingOptions to the OpenSource version.

java/libphonenumber/src/com/google/i18n/phonenumbers/ParsingOptions.java

@@ -30,7 +30,10 @@ public class ParsingOptions {
   public boolean hasDefaultRegion() { return hasDefaultRegion; }
   public String getDefaultRegion() { return defaultRegion_; }
   public ParsingOptions setDefaultRegion(String value) {
-    hasDefaultRegion = (value != null);
+    if (value == null) {
+      throw new NullPointerException();
+    }
+    hasDefaultRegion = true;
     defaultRegion_ = value;
     return this;
   }

java/libphonenumber/src/com/google/i18n/phonenumbers/PhoneNumberUtil.java

@@ -3249,6 +3249,18 @@ public class PhoneNumberUtil {
     parseHelper(numberToParse, options.getDefaultRegion(), options.isKeepRawInput(), true, phoneNumber);
   }
 
+  public PhoneNumber parseWithOptions(CharSequence numberToParse, ParsingOptions options)
+      throws NumberParseException {
+    PhoneNumber phoneNumber = new PhoneNumber();
+    parseHelper(numberToParse, options.getDefaultRegion(), options.hasKeepRawInput(), options.hasDefaultRegion(), phoneNumber);
+    return phoneNumber;
+  }
+
+  public void parseWithOptions(CharSequence numberToParse, ParsingOptions options, PhoneNumber phoneNumber)
+      throws NumberParseException {
+        parseHelper(numberToParse, options.getDefaultRegion(), options.hasKeepRawInput(), options.hasDefaultRegion(), phoneNumber);
+      }
+
   /**
    * Returns an iterable over all {@link PhoneNumberMatch PhoneNumberMatches} in {@code text}. This
    * is a shortcut for {@link #findNumbers(CharSequence, String, Leniency, long)