functions for weibull competing risks
Changed default maxiter for newt_raph to 500
Initial competing risks Weibull functions
roxygenise
Fixed a mistaken link in weibull_compet2 documentation
Fixed a mistaken link in weibull_compet2 documentation
Merge branch 'compet' of https://github.com/dcmuller/randsurv into compet
Merge from upstream to update docs