Inode.IsDir and FileInfo.Mode produce incorrect results #9
Description
fs.FileMode specifies a number of bits that do not match the
file mode bits defined in the inode, so constructing a valid
fs.FileMode requires translating bits 9-16 into the equivalent
flags defined in fs package vs just casting the filemode bits
from the inode.
In addition, the IsDir method in inode was incorrect - a block device
has the value 0x6000, which means IsDir will return true for block
device nodes.
#8 should fix these problems