add citation

fix English grammar on some printing outputs

fix errors on the deep emotion recognizer

fix more issues on the examples on README

update README to fix an error

update scikit-learn version on requirements and README

Merge pull request #34 from x4nth055/dependabot/pip/tensorflow-2.5.2

Bump tensorflow from 2.5.1 to 2.5.2

update tf version in README

update README to add one more example

adding audio conversion to appropriate format in the fly

rename confusing method name from n_emotions() to get_n_samples()

remove model parameter at init in DeepEmotionRecognizer

'model' parameter is now optional to EmotionRecognizer()

remove 'train' param on determine_best_model() function