# 2.0 Correct bug in logrr.  Correct documentation.  Update
      package to use pbapply for progress bar, when 
      possible.
# 2.1 Print function for kdenv. Better output from *.test functions. 
      Updated documentation.
# 2.1.1 Update package based on spatstat update.
# 2.2 Add color gradient function better for logrr.
# 2.3 Add print, summary methods for kdenv, spscan objects. Add cluster
      function. Add print methods for logrrenv, logrr_test.
# 2.4 Update imports for spatstat.random.