Add an explicit 'None' option to the 'Speak punctuation' setting.

android/res/layout/speak_punctuation_preference.xml

     <RadioGroup
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:focusable="false">
+        android:focusable="false"
+        android:id="@+id/options">
 
         <RadioButton
             android:layout_width="match_parent"
             android:focusable="false"
             android:focusableInTouchMode="false"
             android:clickable="true" />
+
+        <RadioButton
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:text="@string/punctuation_none"
+            android:id="@+id/none" />
     </RadioGroup>
 
     <EditText
         android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="48dp"
         android:id="@+id/punctuation_characters"
-        android:hint="@string/punctuation_characters"
-        android:layout_marginLeft="32dp" />
+        android:hint="@string/punctuation_characters" />
 
 </LinearLayout>

android/src/com/reecedunn/espeak/SpeakPunctuationPreference.java

 public class SpeakPunctuationPreference extends DialogPreference {
     private RadioButton mAll;
     private RadioButton mCustom;
+    private RadioButton mNone;
     private EditText mPunctuationCharacters;
 
     private VoiceSettings mSettings;
         View root = super.onCreateDialogView();
         mAll = (RadioButton)root.findViewById(R.id.all);
         mCustom = (RadioButton)root.findViewById(R.id.custom);
+        mNone = (RadioButton)root.findViewById(R.id.none);
         mPunctuationCharacters = (EditText)root.findViewById(R.id.punctuation_characters);
         return root;
     }
     protected void onBindDialogView(View view) {
         super.onBindDialogView(view);
 
-        if (mSettings.getPunctuationLevel() == SpeechSynthesis.PUNCT_ALL) {
-            mAll.toggle();
-        } else {
-            mCustom.toggle();
+        switch (mSettings.getPunctuationLevel()) {
+            case SpeechSynthesis.PUNCT_ALL:
+                mAll.toggle();
+                break;
+            case SpeechSynthesis.PUNCT_SOME:
+                mCustom.toggle();
+                break;
+            case SpeechSynthesis.PUNCT_NONE:
+                mNone.toggle();
+                break;
         }
 
         mPunctuationCharacters.setText(mSettings.getPunctuationCharacters());
                 if (text != null) {
                     characters = text.toString();
                 }
-                if (characters == null || characters.isEmpty()) {
+
+                if (mNone.isChecked()) {
+                    level = SpeechSynthesis.PUNCT_NONE;
+                } else if (characters == null || characters.isEmpty()) {
                     level = mAll.isChecked() ? SpeechSynthesis.PUNCT_ALL : SpeechSynthesis.PUNCT_NONE;
                 } else {
                     level = mAll.isChecked() ? SpeechSynthesis.PUNCT_ALL : SpeechSynthesis.PUNCT_SOME;