Changes to 0.7:

 o L1 and L2 dissimilarities for fuzzy multisets added.

 o fuzzy_pi() - generator added

 o (fuzzy) multisets are now n-bounded (n = maximal multiplicity).
   This now allows consistent complement-building.

 o nu-cuts added (filters elements according to multiplicity).

Changes to 0.6:

 o fuzzy inference framework added

 o converters for matrices added

Changes to 0.5:

  o bug fixes in ordering function and as.character.cset

Changes to 0.4:

  o fuzzy function generators added

  o extended plotting for fuzzy sets added

  o several functions for memberships transformation added

  o performance of matching operator improved

  o optional universes for gsets added

Changes to 0.3:

  o support for customizable sets (cset) added

Changes to 0.2-1:

  o set_options() added

Changes to 0.2:

  o A *lot* of bug fixes
  o closure and reduction of sets added

Changes to 0.1:

  Initial release, implementing data structures and methods for
  o ordinary sets
  o generalized sets (fuzzy sets, multisets, fuzzy multisets)
  o as well as support for fuzzy logic.