Create alibaba-XBrain ==============  This is a workshop for XBrain.  1. 't_alibaba_data.csv' is the original data file; 2. 'train.csv' contains original data for training;(month 4 to 7) 3. 'test.csv' contains original data for testing;(month 8) 4. 'pre_data.py' is the python script used for getting 'train.csv' and 'test.csv';(unnecessary now) 5. 'build_truth.py' is used for building the 'groundtruth.txt' file; 6. 'evaluate.py' is used for evaluating the performance of algorithm; 7. 'groundtruth.txt' is generated easily and 'predict.txt' is our algorithm's output; (now these two files are just model)  To do:   Design algorithm and give a 'predict.txt' file ASAP.      By Sean, 2014.3.11 00:53