version 1.0.2
- Fixed minor bugs
version 1.0.1
- Fixed a bug in ml.est: function pred.y now receives the optional parameter tau
- Added new options for sel.pairs 
- Added new function sel.plot
version 0.9.0
- some work on vignette
- Fixed a bug in ml.est: a vector of covariate is now accepted.
- Improved checks in sel.edit
- Added 'legend' option for sel.pairs (defaults to TRUE)

version 0.8.1
- initial version