- extend existing FileUpload, so we can handel failed instand upload
later
- new Activity to handle failed instant uploads
- new Activity InstantUploadActivity can be started at two ways,
     -touch to the 'Faild Upload Notifivation'
     -submenue underneath the upload menue  
- merges from head
- add lazy loading for the images list with failed uploads
moved About App into preferences 
https://github.com/owncloud/android/issues/57