Changes in version 2.2.2 (2015-01-11)

Other
    o   CITATION file uses package metadata

Changes in version 2.2.1 (2014-11-27)

New features or changed behaviour of old functions

    o   run.scenarios() allows value "linear" for model2D argument of sim.popn 
    o   details 'userdist' argument suppressed when printing summaries
    o   make.scenarios() optionally generates scenarios with group structure (e.g. males and females)
    o   run.scenarios() simulates composite (grouped) populations

Bugs fixed
    o   validate() did not catch NaN values

Other
    o   attribute 'regionarea' renamed 'regionsize' to cover linear case
    o   workflow figure dropped from secrdesign-package.Rd (see vignette)
    o   argument order changed in summary.selectedstatistics
    o   default extractfn checks for non-null 'fit' of returned secr object

Changes in version 2.1.3 (2014-06-04)

    o   vignette renamed and edited
    o   vignette source code included

Changes in version 2.1.2 (2014-04-29)

New features or changed behaviour of old functions

    o   validate() function to set out-of-range values to NA
    o   min, max as fields in summary.selectedstatistics
    o   secrdesign.pdf vignette
    o   header in summary output now includes pop.args
    o   run.scenarios() allows IHP population simulation as 
        alternative to specifying uniform density

Bugs fixed

    o   maskset was not saved when specified in run.scenarios()
