Zvolv-sdk

- Improved code based on PEP 8.
- Changes include renaming.
- Added utility file for password related functions.
- Added files to do operation for roles and users.
- Added verifySSL parameter in ZvolvClient class to skip SSL certificate validation if required.
- Added utility function to generate random password
- Upgrading version to 0.0.30

**Full Changelog**: https://github.com/zvolvapi/python-zvolv-sdk/compare/v0.0.26...v0.0.27

**Full Changelog**: https://github.com/zvolvapi/python-zvolv-sdk/compare/v0.0.25...v0.0.26

**Full Changelog**: https://github.com/zvolvapi/python-zvolv-sdk/compare/v0.0.24...v0.0.25