Added VS settings file that contains the current project coding conventions.

It can be automatically applied by the QuickSettings extension, or done manually by the developer.
Merge pull request #465 from kzu/AddVsSettings

Added VS settings file that contains the current project coding conventions
Added missing reactive members.
Fixed code analysis issue with naming of Get
Added missing check for empty/null login and its tests
Merge pull request #449 from kzu/GetAndIsMember

Implemented Get / IsMember for teams
Added GetMembers to retrieve all team members.
Fixed indenting.

Conflicts:
	Octokit.Tests/Clients/TeamsClientTests.cs
Added tests for the observable teams client.