Writing train part
Diverge point:1.Mixed CRIPSR population  2.Branch:Seperated CRISPR population
Begin to write the entropy method
Starting to write informatin gain
50% of entropy
Finished training part,not carefully tested tommorow works on testing part ,easy job with 1 or 2 function
Finish the first version but not tested,and it have no main body to run through the whole program but only testing part fullfill the main function
Train part is tested,now is testing the test part of CPRA
Finished and tag it as v0.1.0
This is the version 0.1.1 the difference is that the train part add the  population credit into the algorithm
Small changes like add accuracy in the log, slightly prune the code
add the output of CRISPR array to see the actual construction
Add prune fuction to reduce useless segments whose value is 0
Add train data accuracy, result is puzzling.