Version bump to 0.6 (drop -alpha suffix)

AndroidManifest.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="at.bitfire.davdroid"
-    android:versionCode="37"
-    android:versionName="0.5.14-alpha" android:installLocation="internalOnly">
+    android:versionCode="38"
+    android:versionName="0.6" android:installLocation="internalOnly">
 
     <uses-sdk
         android:minSdkVersion="14"

src/at/bitfire/davdroid/Constants.java

@@ -9,7 +9,7 @@ package at.bitfire.davdroid;
 
 public class Constants {
 	public static final String
-		APP_VERSION = "0.5.14-alpha",
+		APP_VERSION = "0.6",
 		ACCOUNT_TYPE = "bitfire.at.davdroid",
 		WEB_URL_HELP = "http://davdroid.bitfire.at/configuration?pk_campaign=davdroid-app",