2019-04-08: Version 0.5-2, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Optimizing as.relation functions using lapply instead of for-loops
* Correcting bug in kdomain w.r.t. kfamset class

2018-11-29: Version 0.5-1, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* as.famset: Using matrix colnames as names for items
             Correcting letters computation for names

2018-09-17: Version 0.5-0, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Introducing kfamset class
* New methods plot.kfamset, closure.kfamset, reduction.kfamset,
  as.relation.kfamset 
* Updating documentation

2018-04-14: Version 0.4-1, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Removing pks-crossreferences from documentation

2018-04-13: Version 0.4-0, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Extending kvalidate() results for VC and Gamma coefficients
* Introducing new function as.binaryMatrix()
* Completely rewriting as.relation.kstructure() and as.relation.kbase()

2018-04-09: Version 0.3-3, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Extending kvalidate() by method "DI" (Discrepancy Index)

2018-03-01: Version 0.3-2, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* New function as.famset()

2018-02-26: Version 0.3-1, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Changed lpath.R making leaning paths sets instead of tuples according
  to the theory

2018-01-03: Version 0.3-0, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* Corrected katoms.R grep call

* Introduced new function neighbourhood()

* Rewrote kfringe...() functions using neighbourhood function

* Introduced new class kbase:
- Changed return class for kbase()
- New S3 methods as.relation.kbase and closure.kbase
- Allowing kbase parameter in katoms(), kdomain(), knotions(), kspace()

2017-12-12: Version 0.2-2, Cord Hockemeyer <cord.hockemeyer@uni-graz.at>

* R/kstructure.R: kstructure() now includes the empty set and the full
  item set.

* man/kstructure.md: Changed accordingly.

* R/plot.kstructure.R: Changes to reflect the new rules for suggested 
  packages.

* Added a4wide.sty to vignettes directory
