Release Name: 0.12.0

Notes:
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).

Include:
* 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.
* Anova: generic and vector-based One-way ANOVA
* Tests: F, T, Levene, U-Mannwhitney.
* Regression: Simple, Multiple (OLS), Probit  and Logit
* Factorial Analysis: Extraction (PCA and Principal Axis), Rotation (Varimax, Equimax, Quartimax) and Parallel Analysis, for estimation of number of factors.
* Reliability analysis for simple scale and helpers to analyze multiple scales using factor analysis and correlations
* Dominance Analysis, with multivariate dependent and bootstrap (Azen & Budescu)
* Sample calculation related formulas
* Creates reports on text, html and rtf, using ReportBuilder gem


Changes:
=== 0.12.0 / 2010-06-09

* Modified Rakefile to remove dependencies based on C extensions. These are moved to statsample-optimization
* T test with unequal variance fixed on i686
* API Change: Renamed Reliability::ItemAnalysis and moved to independent file 
* New Reliability::MultiScaleAnalysis for easy analysis of scales on a same survey, includind reliability, correlation matrix and Factor Analysis
* Updated README to reflect changes on Reliability module
* SvgGraph works with reportbuilder. 
* Added methods on Polychoric based on Olsson(1979): the idea is estimate using second derivatives.
* Distribution test changed (reduced precision on 32 bits system