Added CSRF module

[aman566]

This is CSRF vulnerability module. Currently the module checks for:

1. SameSite=Strict | Lax Set-cookie attributes.
2. Checks for referer headers dependence on CSRF.
3. Manipulating the CSRF token if present. Currently it searches for the following keywords: csrf_token, CSRFName, CSRFToken, anticsrf, __RequestVerficationToken, token, csrf, _csrf_token, csrfmiddlewaretoken, yii_anticsrf.
4. If not type="hidden" in the response text is present checks.

It needs more improvement. Suggestion are most welcome!!!

Checklist

• I have followed the Contributor Guidelines.
• The code has been thoroughly tested in my local development environment with flake8 and pylint.
• The code is both Python 2 and Python 3 compatible.
• The code follows the PEP8 styling guidelines with 4 spaces indentation.
• This Pull Request relates to only one issue or only one feature
• I have referenced the coresspoinding issue number in my commit message
• I have added the relevant documentation.
• My branch is up-to-date with the Upstream master branch.

Your development environment

• OS: Linux
• OS Version: Ubuntu 18.04
• Python Version: 3.6.9

[Ali-Razmjoo]

this can't be supported anymore. modules are yaml #440