=== 0.13.4 / 2010-08-18

* Added cache for tetrachoric correlation matrix
* Extra documentation. Renamed internal two step estimation methods on Polychoric

=== 0.13.3 / 2010-06-22

* Bug fix on Processor.fd_loglike_cell_rho. 
* Chi square added on spec. 
* Olsson (1979) added on references
* Derivative version of joint estimate operational

=== 0.13.1 / 2010-06-21
* Better specs. Bug fix on Manifest.txt

=== 0.13.0 / 2010-06-21

* First independent version of statsample-bivariate-extension