IAdvancedContentRepositoryUserRepository: Move "Current" out to own child repository

[HeyJoel]

It feels like these could be moved out to a child repository e.g. _contentRepostory.Users().Current().XYZ:

• UpdateCurrentUserAccountAsync
• UpdateCurrentUserPasswordAsync
• GetCurrent

[HeyJoel]

Fixed, will be released in v0.10. The API has a breaking change, with methods moved under the new "Current()" extension method e.g.

var user = await _contentRepository
                .Users()
                .GetCurrent()
                .AsMicroSummary()
                .ExecuteAsync();

is now:

var user = await _contentRepository
                .Users()
                .Current()
                .Get()
                .AsMicroSummary()
                .ExecuteAsync();