trying to merge readme files

Merge branch 'master' of https://bitbucket.org/levintow/actg

# Conflicts:
#	README.md

README.md

-# WIHS Data Set #
-
-This package contains data from the Women's Interagency HIV Study (WIHS).
-The WIHS is an ongoing observational cohort study with semiannual visits at 10 sites in the US.
-
-### Codebook ###
-
-* id = patient identifier
-* idu = injection drug use history (1, 0)
-* white = white or non-white (1, 0)
-* age = years of age on 12/6/1995
-* cd4 = CD4 count in cells/mm^3 measured at last visit before 12/6/1995
-* drop = loss to follow up (1, 0)
-* delta = endpoint of AIDS or death (1, 0)
-* art = time from 12/6/1995 to ART initiation (missing is never started)
-* time = time from 12/6/1995 to AIDS or death (admin censoring at 10 years)
-
-### Notes ###
-
-* There is one record per patient.
-* The ART variable can be used as a competing event time.
-* Times here are measured in decimals (or Colombian time), such that 365.25 days is 1.000 years.
-