1. Removed duplicate files 2. User can add entitlements

1. Removed duplicate files located both in root and in root/iResign
folders.
2. User can choose an entitlement to use. If not empty, --entitlement
codesign flag will be used with the given entitlement.plist. If empty,
entitlements will not be used.
Merge pull request #10 from mrvincenzo/master

1. Removed duplicate files. 2. Added an option to add entitlements.