Update of do-file 5 (except breaks)

The only thing missing are the breaks á la Pritchett
Update of do-file 3

log --> log10
r(N) > 1-- > r(N) > 30
nq(100) --> nq(10)
More variables (from 27 to 32)
Elimination of oil countrries
Up-date of do-file 2

log --> log10
r(N) >100 --> r(N) > 30
nq(100) --> nq(10)