* add an option in the start menu to update (libirt.sf.net/eirt/LATEST)

* Import parameter estimates to estimate the abilities

* Adjust the margins to fit the width in one page

* Compute the standard deviations with n-1

* Add an option to have miscelanous parameters like bilog and multilog
  (ex: boundary thresholds, normal ogive slopes, intercepts, etc)

* Add an option to have the boundary curves when using graded data

* Show the denominator instead of the number of item in the score section
