Synackapi

There were still a couple lingering issues from the refactor. They should be resolved in this version.

I didn't make it obvious why I had added kwargs to the db.add_targets() function. It was so that I can do things like having is_registered be True without having to re-poll the Targets Synack API endpoint.

* Converted yaml settings to a SQLite database
* Non-time-sensitive data is cached locally in the SQLite database for faster responses and less demand on the Synack API
* Added mdBook based documentation for everything
* Standardized function names
* Converted to a plugin based architecture so files and functions are better organized

* Resolved issue of plugins not being added to PyPI Package

* Added live-tests to easily see changes to the live Synack API
* Created users plugin
* Removed compat.v1. If you used this, just continue to use gexpose's repo instead

* Mission Template functionality added
* Most of plugin refactor completed