// Updates to standsurv



0.1 -  2019-1-20
       test version released on webpage 20/1/2019
0.2 -  2019-03-04
0.34 - 2019-07-03
0.36 - 2019-11-07

0.43 - 2019/02/29
       -- fixed bug with no at option - now behaves as at(.)
       -- added derivative of hazard functions for streg models
       -- now work with ode calculations for competing risks.
       -- error given if a cure models 
       -- fixed some typos in help file.

0.44 - now compiled in 15.1		   

0.45 - 2020-06-09
     - fixed problem with more than 2 competing risks models
     - added error of missing indweights

0.46 - 2020-06-11
     - genind works for competing risks models
     - fixed cif bug (from 0.45)
     
0.47 - 2020-11-28
     - toffset() option now works again
     - contrast(ratio) returned log of ratio without ci option. Now fixed.
     - trans(loglog) gave lci and uci the wrong way round. Now fixed.
	 
0.48 - 2020-12-08
     - cif with rmft now works for competing risks models to estimate loss in life expectancy.     
     
0.50 - 2021-02-03
     - Fixed bug introduced in last release that ode methods for crude probabilities and CIFS gave
       incorrect estimates if not sorted by timevar.
       
0.51 - crude probabilities use ode method by default
     - can now use file from web location in expsurv(using()) option.       
 
0.52 - help file edit + genind() now works when calculating cifs in competing risks models
        
0.53 - bug when calculation ci or se for rmst for exponential models