Release Name: 0.6.5

Notes:
A suite for basic and advanced statistics on Ruby. Tested on Ruby 1.8.7, Ruby 1.9 and JRuby 1.4 (Ruby 1.8.7 compatible) 

Includes:
* Descriptive statistics: frequencies, median, mean, standard error, skew, kurtosis (and many others).
* Imports and exports datasets from and to Excel, CSV and plain text files.
* Correlations: Pearson (r), Rho, Tetrachoric, Polychoric
* Regression: Simple, Multiple, Probit and Logit
* Factorial Analysis: Extraction (PCA and Principal Axis) and Rotation (Varimax and relatives)
* Dominance Analysis, with multivariate dependent and bootstrap (Azen & Budescu)
* Sample calculation related formulas


Changes:
=== 0.6.5 / 2010-02-24
* Bug fix on test: Use tempfile instead of tempdir
* Multiple Regression: Calculation of constant standard error , using covariance matrix.
* Calculation of R^2_yx and P^2_yx for Regresion on Multiple Dependents variables
* Dominance Analysis could use Correlation or Covariance Matrix as input.
* Dominance Analysis extension to multiple dependent variables (Azen & Budescu, 2006)
* Two-step estimate of Polychoric correlation uses minimization gem, so could be executed without rb-gsl