bug fixes, removed native code, enabled all ciphers on server
- removed native code support (for now at least)
! Client: fixed missing __lastpushedfile (scoping rules for private)
+ Server/Client: added result code for DirList which signals if the
  operation was a success or failure and allows Client to return
  None for a failure (path not accessible or does not exist)
+ Server: all ciphers enabled; will use client to test different
  ciphers by limiting it there for now