More attempts at fixing APK generation issues

build.gradle

@@ -6,9 +6,6 @@ buildscript {
         classpath 'com.android.tools.build:gradle:1.1.3'
         classpath 'com.novoda:bintray-release:0.2.10'
     }
-    dependencies {
-        classpath 'com.novoda:bintray-release:0.2.10'
-    }
 }
 
 allprojects {

sample/build.gradle

@@ -14,6 +14,12 @@ android {
     lintOptions {
         abortOnError false
     }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
 }
 
 dependencies {