ENMeval 0.2.2

Major changes in this version are:

o Added a vignette. After installing version 0.2.2, in R type:
vignette('ENMeval-vignette', package='ENMeval').
You can also view the vignette online here
o Added an option to pass additional arguments to maxent (e.g., prevalence)
o Added a function to extract variable importance for maxent models
o Fixed an inconsistency with the AICc columns of the results table when rasterPreds=F
o Fixed potential errors in the partitioning methods functions when used independently