Use updateable proguard rules

app/build.gradle

@@ -67,6 +67,7 @@ dependencies {
     compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.2'
     compile 'com.squareup:otto:1.3.8'
     compile 'io.reactivex:rxjava:1.1.7'
+    compile 'com.artemzin.rxjava:proguard-rules:1.1.7.0'
     compile 'io.reactivex:rxandroid:1.2.1'
     compile 'com.jakewharton:butterknife:8.2.1'
     apt 'com.jakewharton:butterknife-compiler:8.2.1'

app/proguard-rules.pro

@@ -38,7 +38,6 @@
 -dontwarn okhttp3.**
 -dontwarn okio.**
 -dontwarn retrofit2.**
--dontwarn rx.**
 -keepclasseswithmembers class * {
     @retrofit2.http.* <methods>;