Changed preseed file according to lb 3.x new directory standard
Renamed folder to comply with new lb 3.x directives. Dont know if it works...
Revert "Renamed folder to comply with new lb 3.x directives. Dont know if it works..."

This reverts commit cdc43e5fc6e77251fce2cf8e6d02222525b10404.

It didn't worked...
Added some ignored directories...
Added grub-pc package
Removed unused line