HotFix master branch: Set fixed lib version

Android lib update

Update welcome url, fixes #16

Select all within a folder for upload

added the ability to select all within a folder for upload - selection is discarded when navigating folders

Update changelog

Don't forget to update the changelog when doing a new release.
Otherwise the changelog link in f-droid does not show you the features for the new release.

Added app store links

Add documents provider

HOTFIX: Soften cookie

Support animated GiF-Images

- onMeasure sets always width/height

Optimizing the uploader layout & taking user configured sorting into account

now all file list view (uploader, upload external and standard file list have the same layout)