update README

README.md

@@ -104,6 +104,33 @@ startActivityForResult(intent, REQUEST_CODE);
   <item name="actionBarTheme">@style/myTheme.actionBar</item>
   <item name="colorPrimary">#00FF00</item>
 </style>
+```
+
+### Proguard
+
+```
+# Glide
+-keep public class * implements com.bumptech.glide.module.GlideModule
+-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** {
+    **[] $VALUES;
+    public *;
+}
+# nineoldandroids
+-keep interface com.nineoldandroids.view.** { *; }
+-dontwarn com.nineoldandroids.**
+-keep class com.nineoldandroids.** { *; }
+# support-v7-appcompat
+-keep public class android.support.v7.widget.** { *; }
+-keep public class android.support.v7.internal.widget.** { *; }
+-keep public class android.support.v7.internal.view.menu.** { *; }
+-keep public class * extends android.support.v4.view.ActionProvider {
+    public <init>(android.content.Context);
+}
+# support-design
+-dontwarn android.support.design.**
+-keep class android.support.design.** { *; }
+-keep interface android.support.design.** { *; }
+-keep public class android.support.design.R$* { *; }
 ```
 
 ---