Add Matt Wu ext2 filesystem driver

Current ext2 driver is quite old.
ReactOS needs new ext2 driver with better support.
Matt Wu ext2fsd (http://www.ext2fsd.com/) seems a reasonable choice.
Current version is 0.62:

Features Ext2Fsd supports:

• ext2/ext3 volume reading & writing
• ext3 journal replay when mounting
• various codepage: utf8, cp936, cp950 …
• mountpoint automatical assignment
• large inode size: 128, 256, …
• large file size bigger than 4G
• CIFS sharing over network
• htree directory indexing
• ext4 extent read-only, no size truncating and expanding support
• Fast fsck (uninit_bg) and group block checksum support
• 64k block-size, support compatible to Linux ext4 and e2fsprogs
• OS: 2k, xp, vista, server 2003/2008, win7

Features Ext2Fsd doesn’t support:

• fully ext3 journal support
• ext4 extent support
• LVM and Linux raid (md)
• NT4 is no longer supported.