- Support for storing multi-file spec in metadir. Requires that mf spec gets stored as
  <roothashhex>.mfspec in the metadir, along with .mbinmap and .mhash. swift::Open file name
  must be destdir that contains the actual swarm contents, following the mf spec layout.




git-svn-id: http://svn.tribler.org/libswift/branches/tribler-6.1.x@31994 001aeff7-3401-0410-a489-f7902fc005dd