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"
modify README for the Fragment Experiment