* removed lib/sisu/{current,develop} dir branches
  v7 (v5 & v6 retired)
* simplify dir structure, offer single version per snapshot
* have enjoyed carrying stable and development versions v5 & v6
  in a single tarball, may return to this structure

* adjustments to default settings for --act0 to --act9 (to match current "se")
* removed sisurc examples to organize output by filetype, filename, monolingual,
  as one word diff
  output_dir_structure_by: language
  # (language|filetype|(filetype_mono|monolingual)|filename|filename_mono)
  # language
  #   (language and filetype directories);
  # filetype
  #   (filetype directories, filename includes language code);
  # filetype_mono (or monolingual)
  #   (filetype drectories, no language codes in filenames)
  # filename
  #   (directory output similar to v1 v2, filename includes language code);
  # filename_mono
  #   (directory output similar to v1 v2, filename without language code)

* configurable command line options increased to 0 - 9 (instead of 0 - 5)
* use --act0 to --act9 (previous flags -1 to -5; -0 to -9 now available)
* default --act0
* rc config with flag:act0 to flag:act9 (previously roman numerals)
* legacy roman numeral configuration works (for now)

* (further refinement necessary)

* 5.0.0 dev opened
* 4.1.0 stable
* 3.* branch gone