Implement phpseclib

Implemented phpseclib library to login as root and perform root actions
The following features requires to login with a user having root
permission:
shutdown/reboot your raspberry
start/stop services
mount/unmount partitions

Images:

http://i853.photobucket.com/albums/ab94/lorenzorogai/login_zpsefc6ca5d.png

http://i853.photobucket.com/albums/ab94/lorenzorogai/loginfailed_zps7ffff423.png

http://i853.photobucket.com/albums/ab94/lorenzorogai/login_ok_zps56e541d0.png

http://i853.photobucket.com/albums/ab94/lorenzorogai/login_disks_zpsecde62ed.png

http://i853.photobucket.com/albums/ab94/lorenzorogai/login_disks_ok_zps22be1a5e.png

http://i853.photobucket.com/albums/ab94/lorenzorogai/login_disks_unmount_zpsfa45571a.png