Increase Volley disk cache to 16MB

16MB ought to be enough for everyone, especially since it
does not count any full size images

Change-Id: I35121eb0d9949f7cbe254220f64ec879d163204c
GitHub: https://github.com/wikimedia/apps-android-commons/pull/27
Localisation updates from http://translatewiki.net.

Change-Id: I6144cec8c24d6f7f1065b8084b7e5d49b7e85eb2
Do not crash when trying to upload multiple files

Change-Id: Ibe4fe6b7518f9634fc0d9ce8bda9ccbd9ee9c30d
GitHub: https://github.com/wikimedia/apps-android-commons/pull/30
Updated CHANGELOG and bumped version number

Change-Id: Ie38013484ee7d812215af91e5100a2ee0794ea26