Fix docstrings in api.py

Blink detection fix

fix annotation

Adding a fix for a common macOS failure mode

Fix minor error in documentation detailing the default model in use for face_encodings

docs: Fix simple typo, eucledian -> euclidean

Otherwise smaller faces can't be located via command line

There is a small typo in examples/face_recognition_knn.py, examples/facerec_ipcamera_knn.py.

Should read `euclidean` rather than `eucledian`.

Using the keyboard module in linux requires root permission and if virtual envs are used to run the script, it will produce the following error:

ImportError(You must be root to use this library on linux.)

To solve this, use OpenCV waitKey() functionality.

Set q for exiting the program. Move cv2.waitKey() outside the for loop that detects face landmarks.

Real time facial recognition on ip cameras using knn.

Real time fast face recognition on ip cameras using knn.

revise comments

The goal of these changes is to provide actual
information about supported Python versions.
I believe that only versions for those you have
tests on CI should be listed as supported.