Added Emotion Recognition Feature

[urmilkalaria]

Issue Number

fixes # 3

Describe the changes you've made

Added Emotion Recognition Feature that will recognize the emotion such as happy, sad, neutral, angry, surprised and fearful. This is done using Tensorflow. However I have not trained a model here but instead already taken a trained model and perform opencv opeeration to recognize the emotion

Describe if there is any unusual behaviour of your code ( Write NA if there isn't )

NA

Additional context

Add any other context or screenshots about the feature request here.

Test plan ( Optional but Recommended )

To run the code:

python LiveVideoFaceDetection.py --mode display

Checklist

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [x] The title of my pull request is a short description of the requested changes.

[charvibannur]

Good job!! I've merged it.