Update news_list_item.xml

Prevents the news image from being distorted.
Resolve #33 - Downloads go to a subfolder of system downloads

This resolves issue #33 and makes sense - making new folders in
the root of the user storage partition isn't good behaviour
xda-one: remove plus button completely
xda-one: attempt at fixing broken URL handling
xda-one: update android tools and gradle plugin version
Merge branch 'api-21-changes' of github.com:xda/XDA-One into api-21-changes