[TUTO] [1.1][16Oct14]EFS (IMEI) Backup tool (update) N910U/F

1.0 - Initial release for N910U
1.1 - Updated for making backup of other efs related partition as well added support for N910F (all 1.0 user request to make new backup with new version)

-Both version makes backup in same format and no difference in backup.
-Free version will save file in MyEFSSGN4 and if you make next backup it will replace older one. While play store version everytime creates new folder with date ,Time and your IMEI stamp so you can keep multiple backup as well no confulsion about which backup is made when and on which device. Also it makes copy of build.prop so you can get idea you were on which ROM when backup created)
-On free version you have to select option according your device model, if you select wrong your EFS backup will be wrong On play store version it will auto detect your model and make backup accordingly. In case your model not supported it will give warning msg.
-Play store version give notification incase backup not created OR you select wrong model and will have option to contact developer in such case.