2018-01-04 Charles-douard Gigure <ce.giguere@gmail.com>
        * Corrected redefinition of method print.correlation from standard package nlme.
	* Corrected bug with toLatex option when the correlation matrix is asymetrical.
2016-06-27 Charles-Edouard Giguere <ce.giguere@gmail.com>
	* Added freq, a function that displays frequencies of categorical variables.
2016-05-31 Charles-Edouard Giguere <ce.giguere@gmail.com>
	* Added xf, a function that applies function across multiple layers.
