libgdx/libgdx — pull request #2019 by Unkn0wn0ne (2014-06-23 01:48:58+00:00)
Title: Updated proguard configurations to recommended values

The wiki page suggests this: https://github.com/libgdx/libgdx/wiki/ProGuard-DexGuard-and-libGDX
This way all the developer has to do is enable it.