Release Name: 0.2.2

Notes:
Ruby Stats is a port of the statistics libraries from PHPMath. Probability distributions include binomial, beta, and normal distributions with PDF, CDF and inverse CDF as well as Fisher's Exact Test.


Changes:
=== 0.2.2 / 2008-05-09
* Added exponential distribution class
* Replaced constants in NumericalConstants module with uppercase versions to follow Ruby convention  

=== 0.2.1 / 2008-05-08
* Bug fix for Normal Distribution RNG function (RubyForge bug #20044)
   * thanks, Daniel Moore (yahivin)