Some preparations for supporting NTFS capture and apply.

Some preparations for supporting NTFS capture and apply.

- Restore support for reading and writing alternate data streams (this was in
  early versions of wimlib but had been removed for not actually being used...)
- Remove the --disable-security-data option.  I don't think anyone would really
  want this; instead we just copy the existing security data by default.  New
  files will be created without security data except when capturing from NTFS
  (not yet implemented).
- Read and write the reparse tag field.
- Remove --verify, --config, --norpfix from imagex commands.  I'm still not
  planning to do anything with these, so remove them to simplify the commands.
  Who knows, maybe I'll add these back later though...
- wimlib_set_link_type(), wimlib_set_verbose(), wimlib_set_output_dir() removed.
  You now pass flags or the output directory to the relevant functions such as
  wimlib_extract_image().
- --enable-ntfs-3g configure option
- --ntfs options on `imagex capture' and `imagex apply' (Actual operations not
  yet implemented!)