* Added code to classify github issues into the best 3 labels.
1.Created a class to hold Prediction values
2.Added Score filed in GitHubIssuePrediction class.
3.Changed the existing code in Labeler class.
4.Added new method to find the best 3 scores and return their indexes so that we can get the labels of those matched indexes from slotnames.
* Changed the images
* Changed Names
* changed names
* Removed images
* Added images
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