1.0.4: Add files via upload

• Major feature : Added IMLEGIT function, an extension of the original LEGIT model in which you can set as many latent variable as desired instead of just G and E. Also added associated functions (only step-wise search is unavailable with IMLEGIT for now).
• Fixed a bug in the calculations of the residuals, it was only taking the last observation of the dataset when folds != NULL therefore giving the impression that there were no possible outliers.
• Added id option in LEGIT_cv so that the output potential outliers can show this ID rather than just the observation number
• Not looking at levels anymore for id in folds but only at the unique values, no need for factors anymore.
• Fixed multiple bugs in LEGIT_cv with folds option that arised in last update
• Fixed a major bug in LEGIT_cv and IMLEGIT_cv (Please redo your cross-validations just to be sure)
• Fixed minor things