0.2.0.4 (2012-09-26):
    - Math.Combinatorics.Exact.Binomial: added OEIS link
0.2.0 (2012-02-02):
    - renamed to exact-combinatorics.
    - moved Math.Combinatorics.* to Math.Combinatorics.Exact.*

0.1.0 (2011-12-04):
    - init.
