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Release Name: 0.9.0

A suite for basic and advanced statistics on Ruby. Tested on Ruby 1.8.7, 1.9.1, 1.9.2 (April, 2010) and JRuby 1.4 (Ruby 1.8.7 compatible) 

* 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's r, Spearman's rank correlation (rho), Tetrachoric, Polychoric
* Tests: F (Anona One-Way), T, Levene, U-Mannwhitney.
* 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
* Creates reports on text, html and rtf, using ReportBuilder

Changes: === 0.9.0 / 2010-04-04 * New Statsample::Test::F. Anova::OneWay subclasses it and Regression classes uses it.