Permit to restore messages, but it's not finished yet

Remaining problems:
* date is not properly retrieved on the phone
* no feedback when connectivity errors
* no feedback when processing
* no feedback when finishing

src/main/java/fr/unix_experience/owncloud_sms/misc/ComposeSmsActivity.java

@@ -0,0 +1,6 @@
+package fr.unix_experience.owncloud_sms.misc;
+
+import android.app.Activity;
+
+public class ComposeSmsActivity extends Activity {
+}

src/main/java/fr/unix_experience/owncloud_sms/misc/HeadlessSmsSendService.java

@@ -0,0 +1,14 @@
+package fr.unix_experience.owncloud_sms.misc;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.support.annotation.Nullable;
+
+public class HeadlessSmsSendService extends Service {
+	@Nullable
+	@Override
+	public IBinder onBind(Intent intent) {
+		return null;
+	}
+}

src/main/java/fr/unix_experience/owncloud_sms/misc/MmsReceiver.java

@@ -0,0 +1,12 @@
+package fr.unix_experience.owncloud_sms.misc;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class MmsReceiver extends BroadcastReceiver {
+	@Override
+	public void onReceive(Context context, Intent intent) {
+
+	}
+}