Corrected some errors and added n_stumps option

...oMultiViewClassifiers/Metrics/jaccard_similarity_score.py

...latform/MonoMultiViewClassifiers/Metrics/roc_auc_score.py

...latform/MonoMultiViewClassifiers/Metrics/zero_one_loss.py

...MonoMultiViewClassifiers/Monoview/Additions/BoostUtils.py

...noMultiViewClassifiers/Monoview/Additions/CQBoostUtils.py

...oMultiViewClassifiers/Monoview/Additions/QarBoostUtils.py

.../MonoMultiViewClassifiers/MonoviewClassifiers/Adaboost.py

...onoMultiViewClassifiers/MonoviewClassifiers/QarBoostNC.py

...noMultiViewClassifiers/MonoviewClassifiers/QarBoostNC3.py

...onoMultiViewClassifiers/MonoviewClassifiers/QarBoostv2.py

...onoMultiViewClassifiers/MonoviewClassifiers/QarBoostv3.py