[F] Fix markdown format

[U] Update readme for training data

[U] Update folder name

[C] Change max_length to 5

[U] Update readme for predict_example usage

[U] Update characters dict and add predict example

Merge pull request #2 from nbswords/fix_class_mapping

update_old_usage

Fixed class labeling mapping issue

Update README.md

Update README.md

Create LICENSE

Update README.md

Update README.md

Update ocr_captcha.py