Updated android-support-v4.jar

**What**: I updated android-support-v4.jar to be the one in the most recent [Android Support Library](http://developer.android.com/tools/support-library/setup.html).

**Why**: fixes #28. If I use the v7 appcompat library from the Android Support Library together with aFileChooser, the two different android-support-v4.jar files conflict so my project won't compile.

No worries if you don't want to accept this pull request; I can continue using my own fork in that case. But I think it will help others who want to use the support libraries together with aFileChooser. Thanks for your consideration, and thanks for the great library!