Check if root is available when starting the application

Signed-off-by: Rodrigo Belem <rodrigo.belem@gmail.com>
Use AsyncTask to run commands, such as mv, ls and stat.

Signed-off-by: Rodrigo Belem <rodrigo.belem@gmail.com>
Merge pull request #11 from rbelem/more-root

Use AsyncTask to run commands such as mv, ls and stat.