change name of Qayem Dataset to QYM

change name of Qayem Dataset and main folder to QYM
Add L1 penaltized SVC feature selection experiment

added feature selection process based on L1 penaltized LinearSVC
. reading of various datasets
. building TFIDF vectors from training set
. based on output accuracy of penalty "c" select best feature value
. log output of accuracy vs no. of features for each dataset in experiment-results file
. log best selected features for highest accuracy for each dataset in experiment-results file