* implement a method to discern whether some 'thing' is either a storage 
  or a stream
* implement locking which work ofer nfs (use liblockfile from debian)
* write the documentation
* implement efs_rollback (revert) (reread imap/bmap)
* write a better test program (benchmark?) (efstest)
* add some redundance to improve recovery
* implement EFS_TRUNC and EFS_APPEND flags

* howto store file types (store gtk object type name?)
* implement better error handling (set errno)
* compute some cache statistics?
* implement compressed files - zlib support (not seekable)??
* implement special support for small files (store them more efficiently)
* use unused bytes in inode-blocks (for short files, direntries)??
* make efstool more comfortable - implement a graphical tool to 
  manipulate efs-files (and show the allocation bitmap)
* write a MIME-multipart driver ???
* mount external resources?? Bento like (dynamic)types?
* more tests for big-endian systems.
