Change -f parameter type to boolean flag

What's being changed:

• -f parameter type has been changed to boolean flag, previously it required passing the value.

Don't download code files when video files are being downloaded

What's being changed:

• code files downloads for videos are skipped (they're already in video package).

Package on PyPi

What's being changed:

• there is a package on PyPi so one can install script via pip install packt command,
• we no longer parser Packt Free Learning website to parse Google sitekey (as it does not change).

Allow downloading Packt videos via script

What's being changed:

• user can download videos from their Packt account via script,
• list of all available ebooks is not fetched when downloading only just claimed product.

Add PyPi badges to README

v1.0.5

Release 1.0.5

Provide README in PyPi package website

v1.0.4

Release 1.0.4

PyPi configuration

v1.0.3

Release 1.0.3

Fix sending grabbed ebooks to Google Drive

What's being changed here:

• files are downloaded to proper location before being sent to Google Drive.

Packt API client

What's being changed here:

• API client handling Packt API requests is added to the script,
• the client fetches a new JWT on 401 response (that will prevent token's expiration on long script runs).

Use click to generate Packt CLI

There are some major changes in 1.0.0 release:

• the script is now a installable Click script,
• the script uses Packt API,
• support for Python 2.x is being dropped.