// 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