Initial port of the acceptable use tutorial from iOS app. This version uses static images and is not yet animated. Indicator circles on the pager are done using Apache-licensed https://github.com/JakeWharton/Android-ViewPagerIndicator -- imported via maven. Currently the tutorial launches when we reach the login screen (as when first installing the app or creating a new account from system settings). You can either 'back' out of it or page through and hit the 'yes' button.
GitHub: https://github.com/wikimedia/apps-android-commons/pull/20
Change-Id: Ibc444102e28a55bfa7bbae601ff0c56268a0c7dd
Saves original file into the SD card "Downloads" directory via
Android's DownloadManager service.
On Gingerbread the notification vanishes after downloda, but we
force the gallery to reindex the downloads area so you can still
manually bump over to Gallery.
On ICS/JB the notification hangs around and can be used to open
the saved file directly.
Note that on Gingerbread we have to download over HTTP because
DownloadManager didn't support HTTPS.
Included copy of stock 'upload' icon, flipped it for 'download'.
