Fixed issue when check for update feature don't detect current BESH Stat version available on www.beshstat.eu because version is checked against the the cached version file.
Gauss-Jordan elimination option removed from the multiple linear regression option. It was removed as it doesn't add any value to the BESH Stat adding. Other matrix inversion method that are not otherwise used will be removed latter during code refactoring
Standard errors presented in RxC contingency tables measures of ordinal association