Sigsci-site-manager

New Features
- Adds support for site rules, replacing request rules and signal rules (PR 45)

Bug Fixes
- Fixes error in backup/cloning related to API changes around site rules (PR 45)

New Features
- Adds user management commands for managing users independently of site management.

Enhancements
- Advanced rules can be directly copied instead of requesting SigSci support perform the copy
- Block duration for templated rules included in site backup
- Site list output now includes agent mode

Bug Fixes
- Fixed error in help text

Notes
- pysigsci requirement bumped to v3.10.0

New Features
- Add `User-Agent` header during `validation` operation

Bug Fixes
- Fix bug where validation returned success when test could not be sent
- Fix bug where exception would be thrown during validation if auth was unsuccessful.

New Features
- Adds `validate` command to run a set of tests requests against a site to ensure Signal Sciences is operating.

New Features
- Can now filter the output of `list` using a wildcard string (adds `--filter` CLI option)
- Can now run `merge` against multiple sites at once by supporting wildcard strings in the `--dest` CLI parameter
- Can now limit `merge`/`deploy`/`clone` to a subset of data (adds `--include` and `--exclude` CLI options)

Bug Fixes
- No longer throws an error when backing up a site with no advanced rules
- No longer throws an error when merging onto a site with no advanced rules