enabled app2sd, changed build target to API level 8 (2.2) for this

Fixes issue 65

AndroidManifest.xml

@@ -17,7 +17,8 @@
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.thialfihar.android.apg"
-    android:versionCode="10800" android:versionName="1.0.8 beta 00">
+    android:versionCode="10800" android:versionName="1.0.8 beta 00"
+    android:installLocation="auto">
 
     <application
         android:icon="@drawable/icon"

default.properties

@@ -10,4 +10,4 @@
 # Indicates whether an apk should be generated for each density.
 split.density=false
 # Project target.
-target=android-4
+target=android-8