Merge branch 'release/v1.4.7' into develop

v1.4.7 배포

app/build.gradle

@@ -22,7 +22,7 @@ android {
         minSdkVersion 21
         targetSdkVersion 25
         versionCode 1
-        versionName '1.4.6'
+        versionName '1.4.7'
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         multiDexEnabled true