Fix target directory creation when a root path is specified.

[inexorabletash]

Fixes #38

[inexorabletash]

Line endings, grr... will fix.

[mach-kernel]

Thanks a lot! The change works.

$ ./bin/release/cadius extractfile ../abc.2mg /XYZ/hello /tmp/foo                                                                                                                                
./bin/release/cadius v 1.4.5 (c) Brutal Deluxe 2011-2013.
  - Extract file '/XYZ/hello'
  Error : Can't create file 'hello' on disk at location '/tmp/foo/hello#060803'.

$ ./bin/release/cadius extractfile ../abc.2mg /XYZ/hello /tmp/foo                                                                                                                                
./bin/release/cadius v 1.4.5 (c) Brutal Deluxe 2011-2013.
  - Extract file '/XYZ/hello'
hello=Type(06),AuxType(0803),VersionCreate(00),MinVersion(FC),Access(C3),FolderInfo1(000000000000000000000000000000000000),FolderInfo2(000000000000000000000000000000000000)

$ tree /tmp/foo
/tmp/foo
├── _FileInformation.txt
└── hello#060803