[core] enable UEFI NTFS support

* This allows no-sweat UEFI support of Windows installation ISOs
  that contain a >4GB file for instance
* This is done through UEFI:TOGO (https://github.com/pbatard/uefi-togo)
  and the efifs NTFS driver (http://efi.akeo.ie)
* Closes #414
* This will also be part of our implementation of #126

res/grub2/readme.txt

@@ -4,7 +4,6 @@ This directory contains the Grub 2.0 boot records that are used by Rufus
   commit 72ec399ad8d6348b6c74ea63d80c79784c8b84ae, on a Debian 7.7.0 x64 system.
   This was done following the guide from:
   http://pete.akeo.ie/2014/05/compiling-and-installing-grub2-for.html.
-  Note that exFAT was not included in core.img in order to keep it under 31.5 KB.
 
 * boot.img has been modified to nop the jump @ 0x66 as per grub2's setup.c comments:
   /* If DEST_DRIVE is a hard disk, enable the workaround, which is

res/uefi/readme.txt

@@ -0,0 +1,12 @@
+This directory contains a flat image of the FAT UEFI:TOGO partition added by
+Rufus for Windows To Go UEFI mode support as well as seamless installation of
+Windows in UEFI, in the case where the original media contains a >4GB file.
+
+This image, which you can mount as FAT filesystem or open in 7-zip, contains
+the following data:
+o The NTFS UEFI driver from efifs (https://github.com/pbatard/efifs) which was
+  compiled, with compression disabled, using Visual Studio 2013 Community Edition.
+  This is the \EFI\Rufus\ntfs_x64.efi file.
+o The UEFI:TOGO binary (https://github.com/pbatard/uefi-togo), which was compiled
+  using Visual Studio 2013 Community Edition.
+  This is the \EFI\Boot\bootx64.efi file.