Update the Get Started tutorial for Python connector

[andreyaksenov]

Updated topics:

• Connecting from Python
• Python - removed unnecessary "quick start" and added a link to the updated tutorial.
• Added a note about making requests to sharded clusters with the crud module (net.box/Go/Python tutorials).

The Connecting from Python tutorial has the same steps and uses the same database as the Connecting to a database using net.box and Connecting from Go tutorials. The upcoming C/C++ tutorials are going to have the same layout.

Note that the sample script referenced in the tutorial doesn't handle any connection/request errors for simplicity.

[DifferentialOrange]

Thank you, seems cool

[p7nov]

LGTM 👍

[p7nov]

Suggested change

	Now you can a client Python application that makes requests to this database.
	Now you can create a client Python application that makes requests to this database.

[p7nov]

Suggested change

	``connection.insert()`` is used to insert a tuple to the space.
	``conn.insert()`` is used to insert a tuple to the space.

[p7nov]

or Connection.insert() if you refer to the library class instead of exact object in this example.
Same for occurrences of connection.<method_name> below in text.