show savedInstanceState
setContentView onCreate if savedInstanceState is null
Revert "setContentView onCreate if savedInstanceState is null"

This reverts commit 00b14dfd29deb3113c3c3da5ec003b16f46bb8a0.
Revert "show savedInstanceState"

This reverts commit 257440a7e1f55da2646ec0e198a99d0e98ca86a3.
remove TextView in MainActivity
create fragment 0 and 1

ref. http://android.keicode.com/basics/fragments-basic.php
fix to avoid an error

error log:
E/AndroidRuntime(10965):        at net.kaosfield.app.MainActivity.onCreate(MainActivity.java:12)
E/AndroidRuntime(10965): Caused by: java.lang.ClassNotFoundException: android.view.Fragment in loader dalvik.system.PathClassLoader[/data/app/net.kaosfield.app-1.apk]

import android.support.v4.app.FragmentActivity

DO NOT import com.google.android.gms.maps.SupportMapFragment

extend FragmentActivity instead of Activity

modify "android:name" to "class" in layout/fragment_*.xml

ref. http://stackoverflow.com/questions/18557706/java-lang-classnotfoundexception-in-dalvik-system-pathclassloader-findclass
replace Fragment namespace

android.app.Fragment -> android.support.v4.app.Fragment

ref. http://d.hatena.ne.jp/sakura_bird1/20111208/1323300279
fix "Fragment" -> "fragment"