updating Proguard, replace Otto with EventBus

Author: tibbi

app/proguard-rules.pro

@@ -1,6 +1,6 @@
-# Otto
+# EventBus
 -keepattributes *Annotation*
 -keepclassmembers class ** {
-    @com.squareup.otto.Subscribe public *;
-    @com.squareup.otto.Produce public *;
+    @org.greenrobot.eventbus.Subscribe <methods>;
 }
+-keep enum org.greenrobot.eventbus.ThreadMode { *; }