Modified populate database method to directly fetch upstream data.

[shivanshuraj1333]

Fixes #52
populate_db.py is modified to fetch updated data directly from https://github.com/spdx/license-list-data.

Also, license_text field contains complete updated license text.

Takes very less time to populate database

Note1: CSV file is no more needed to populate data base, I'm not removing it in this pull request (since PR #48 is not merged/closed yet)
Note2: I am intentionally commenting out previous method of data population, since in this pr CSV is not removed"

[zvr]

using PyGitHub requires a GitHub account (I think, and your code confirms it), which should not be a prerequisite for running clio.

the data can be accessed without any account.

[shivanshuraj1333]

Removed user authentication in PyGithub. Now anyone can populate/use Clio locally.
PyGithub will also be used in some future work.

[zvr]

comments:

• code shouldn't be reading the directory entries, but the licenses.json that describes them
• code should also read the exceptions.json in the same manner
• more importantly, you shouldn't be reading the repository which might have transient commits, but use only one of the official releases https://github.com/spdx/license-list-data/releases

[shivanshuraj1333]

Okay,
Thank you, I will update my script accordingly.

[shivanshuraj1333]

Flow of updated script:

Advantages of above approach:

• PyGithub will be removed.
• Database will contain data according to each release.
  Note: According to issue No facility to display exceptions and deprecated license. [UI improvement] #54 there is no UI to handle exceptions at present, it will be handled later after UI improvements.