Adds release proguard rules.

Author: andrewsosa

mobile/mobile-release.apk

@@ -15,3 +15,21 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+-dontwarn rx.**
+
+-dontwarn okio.**
+
+-dontwarn com.squareup.okhttp.**
+-keep class com.squareup.okhttp.** { *; }
+-keep interface com.squareup.okhttp.** { *; }
+
+-dontwarn retrofit.**
+-dontwarn retrofit.appengine.UrlFetchClient
+-keep class retrofit.** { *; }
+-keepclasseswithmembers class * {
+    @retrofit.http.* <methods>;
+}
+
+-keepattributes Signature
+-keepattributes *Annotation*