The harmonic series is the
sum of the reciprocals of the
integers:

1 + 1/2 + 1/3 + 1/4 + 1/5 + ...

Write a function which takes
an integer N, and returns a
an array of N integers,
with array[i] = sum of the first
i numbers in the harmonic series.

Assume array[0] = 0;