rubystats version 0.2.2 has been released!

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)