fixed build.gradle to allow working on project in Android Studio

Author: Salakar

Diff for: android/build.gradle

@@ -1,3 +1,16 @@
+// START - required to allow working on this project inside Android Studio
+// YES, jcenter is required twice - it somehow tricks studio into compiling deps below
+// doesn't break anything anywhere else and projects using this lib work as normal
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.1.3'
+    }
+}
+// END
+
 apply plugin: 'com.android.library'
 
 android {
@@ -18,10 +31,20 @@ android {
     }
 }
 
+// START - required to allow working on this project inside Android Studio
+// YES, jcenter is required twice - it somehow tricks studio into compiling deps below
+// doesn't break anything anywhere else and projects using this lib work as normal
+// you'll now have code completion/validation and all the other AS goodies.
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+// END
+
 dependencies {
     compile 'com.facebook.react:react-native:0.20.+'
-    compile 'com.google.android.gms:play-services-base:9.8.1'
-
+    compile 'com.google.android.gms:play-services-base:9.8.0'
     compile 'com.google.firebase:firebase-core:9.8.0'
     compile 'com.google.firebase:firebase-auth:9.8.0'
     compile 'com.google.firebase:firebase-analytics:9.8.0'