Thumbnail for local images
Thumbnail preview
Thumbnail in ListView
Thumbnail generation in ListView
Remote fetch of thumbnail
Thumbnail
Merge branch 'develop' of https://github.com/tobiasKaminsky/android into develop

Conflicts:
	src/com/owncloud/android/ui/adapter/FileListListAdapter.java
Update thumbnails
Added x and y to specify maxX and maxY in route.
Added requested changes.
Re-added thumbnail generation for files that are not images.
Removed accidently added remote thumbnail generation.
Merge branch 'develop' of https://github.com/tobiasKaminsky/android into thumbnails_for_downloaded_images
Fix bug. App crashes when installing it
Fixed bug. When there is a downloaded file which is not support as tiff, app crashes
Work around constaint in valid key for DiskLruCache (capital letters are not allowed)
Minimized memory use in load of bitmaps for thumbnails generated from local files
Protect the app against crashes due to fails in creation of thumbnails
Protect the app against crashes when opening the thumbnails cache
Add column 'update_thumbnail' to the local files db for controlling the update of the thumbnails when images are updated on the server