Add luksEncryption and Swap for installation

Works for me.

It is now possible to encrypt Root filesystem only.

I don't want to encrypt swap because i am not sure if we have to enter 2 passphrase at boot :
- 1 for root.
- 1 for swap

It can be nice to implement LVM to encrypt **All** in the futur and set 1 passphrase at boot.
It is possible to create an USB key with 512/1024 ascii passphrase, to not set a password at boot, but we ust have the USB key to boot... delicate thing :)


Swap partionning is now ok for automatic and manual partitionning.