Add better documentation to work on python scripts

[opengeostat]

There is no documentation on how to use imageanalytics from a python script, for example, from a Jupyter Notebook. Please add simple examples like the one below to the documentation:

# import image analytics (installed with conda)
from orangecontrib.imageanalytics import image_embedder  

# instatntiate
emb = image_embedder.ImageEmbedder(model="squeezenet")

# embed two images by passing the file path
print(emb(['image001.jpg', 'image001.jpg']))

# embed images by passing the file path
print(emb(['image001.jpg', 'image001.jpg']))

# embed from Orange Table
import Orange
Table = Orange.data.Table('Table_with_image_path.csv')
emb_table = emb.from_table(Table)

[PrimozGodec]

Thank you. Will create simple documentation for image_embedder module