v5.5.0

v5.5.0 (#9)

Major updates
* Extending IOption<T> to be used instead of IResult<T> (which is now removed to a separate repo), and making all the implementations pure functions
* Moving Option<T> Linq query support to Jeebs.Linq namespace - it now works asynchronously, and can be mixed with synchronous functions as well
* Adding almost complete test coverage for Jeebs.Option
* Adding Authentication and Authorisation support, including data, JSON Web Tokens, MVC, and a Razor package with a standard login form
* Rewriting IMsg, ILogMsg, and IExceptionMsg support and handling - namespacing messages within the class definition they relate to

Minor updates
* Using .editorconfig to enforce code styles and ignore warnings

Documentation updates
* Adding copyright / licence file header to all source files