Blog Fragment in Navigation Drawer with Tabs

This replaces the custom layouts in the navigation drawer with a
`NavigationView` and adds a menu entry for Blogs.

A Main Blogs fragment is added that holds a `TabLayout` and a
`ViewPager`. Five tabs are already added, but they just have a single
placeholder fragment that is to be replaced by the actual fragments.

Closes #409

briar-android/src/org/briarproject/android/blogs/MyBlogsFragment.java

@@ -0,0 +1,55 @@
+package org.briarproject.android.blogs;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import org.briarproject.R;
+import org.briarproject.android.fragment.BaseFragment;
+
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+
+public class MyBlogsFragment extends BaseFragment {
+
+	public final static String TAG = MyBlogsFragment.class.getName();
+
+	@Inject
+	public MyBlogsFragment() {
+	}
+
+	static MyBlogsFragment newInstance(int num) {
+		MyBlogsFragment f = new MyBlogsFragment();
+
+		Bundle args = new Bundle();
+		args.putInt("num", num);
+		f.setArguments(args);
+
+		return f;
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container,
+			Bundle savedInstanceState) {
+
+		View v = inflater.inflate(R.layout.fragment_blogs_my, container,
+				false);
+
+		TextView numView = (TextView) v.findViewById(R.id.num);
+		String num = String.valueOf(getArguments().getInt("num"));
+		numView.setText(num);
+
+		return v;
+	}
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+}