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.
Enable log into text file automatically when BuildConfig.DEBUG is true. Open log activity when user clicks on action bar menu option. Add button to send email with log file attached.
First changes for saving logs
FileUploader service checks existance of account when receives an upload request
Done some changes for storing the log messages on log file and grant that logs are added to the same log file when the app is killed, then reopened
Change log messages for using our logger in all logs
Remove unused code for accesing to log file from Preferences class
Manage size of log file automatically, handling two log files with a maximun size
Visualize both older and current log files info in the log history view and send both attached in the mail
Add delete history login and chang the date format in logs
Set maximum file size for logs and format logs info