Bump both rxAndroid and httpok to latest version

Author: android10

buildsystem/dependencies.gradle

@@ -16,10 +16,10 @@ ext {
   butterKnifeVersion = '7.0.1'
   recyclerViewVersion = '21.0.3'
   rxJavaVersion = '1.0.14'
-  rxAndroidVersion = '0.24.0'
+  rxAndroidVersion = '0.25.0'
   javaxAnnotationVersion = '10.0-b28'
   gsonVersion = '2.3'
-  okHttpVersion = '2.3.0'
+  okHttpVersion = '2.5.0'
   androidAnnotationsVersion = '20.0.0'
 
   //Testing