11/01/2010:  Version 0.9.0

   o Added a non-binding futility boundary to gsdesign

04/16/2010:  Version 0.8.10

   o variable names for returned data.frame in coxphQuantile
   o examples in coxphQuantile & coxphCPE use status==2

04/09/2010:  Version 0.8.9

   o check Rversion so that coxphCPE works for any version (see 0.8.9)

04/07/2010:  Version 0.8.8

   o Change coxphCPE to reflect the fact that model.matrix.coxph doesn't 
     have an intercept term.

02/25/2010:  Version 0.8.8

   o Added the function or2pcase

11/20/2009:  Version 0.8.7

   o Fixed the 0/0 bug in the revised pselect

11/17/2009:  Version 0.8.6

   o Changed Venkat's affiliation to MSKCC.
   o Fixed pselect to calculate the selection probability correctly when
     only one treatment exceeds the min.resp threshold.

07/10/2009:  Version 0.8.5

   o Changed the Jonckheere-Terpstra statistic such that large value is 
     indicative of increasing group locations and small for decreasing.
     Function warns that p-value is based on approximation for tied data.

12/02/2008:  Version 0.8.4

   o Added functionality to pselect.  It can do unequal sample size for 
     the case of two treatments.  min.diff can be specified as a rate 
     instead of number of responses.  Output element names changed to be
     more descriptive.

11/18/2008:  Version 0.8.3

   o Fixed the bug CPS.ssize. call inside used fixed alpha, power & r.

09/18/2008

   o Fixed the bug in the approximate one-sided p-value of Jonckheere 
     test. wrong tail was used. 

06/20/2008:  Version 0.8.2

   o toxbdry allows the error threshold to prioritize when the sample 
     size is too small to have both satisfied.

06/17/2008:  Version 0.8.1

   o Fixed gsdesign to allow for fixed sample designs.  Help file fixed.

05/23/2008:  Version 0.8.0

   o New version with one new function power.lehmann.design