Polyswarm

- Less strict validations of URL provided as argument when scanning or sandboxing.
- Scans and Sandboxes show "Failure Reason" if set in the response.
- Fix exception when sandbox doesn't have the `config.artifact_type` field set.

- New command `polyswarm account whois`
- New command `polyswarm account features`
- New options to create zip reports: `polyswarm report create [--sandbox_artifact_types|--zip-report-ids]`
- New option `--qrcode-file` to submit URLs from QR Code images in `polyswarm scan url` and `polyswarm sandbox url`.
- Rename in commands the `--sandbox` argument to `--provider`.
- Display more information when sandboxing or fetching old sandbox tasks.

- Support zip file submissions

- Introduction of HTML and PDF reports generation via the `report` CLI command.
- Introduction of reports templates management via the `report-template` CLI command.
- Minimal Python version supported is 3.7 (dropped support for 3.5 and 3.6).

- new `polyswarm sandbox url` command
- fix a bug where the permalink is still shown for a failed scan

Changelog:

- fix for iocs by hash command