*   Minor change
**  Major change

2.2-0 (2016-12-30)
  * exported function incidenceMatrix.
  * updated citation

2.1-1 (2016-11-08)
  *  prepare for CRAN submission.

2.1-0 (2016-06-28)
  ** "grpregOverlap" now works for survival analysis (Cox model) if specifying
      "family = cox". Related methods for survival analysis, like 
      cv.grpsurvOverlap, predict.grpsurvOverlap, are added. The generic functions,
      like plot, summary, predict can also handle survival model fitting and
      cross-validation.
	*  Handle cases where variables in X are not included in "group" input.
