Changed BaseUrl to Uri instead of string
Added overloaded constructor to support backwards compatibility with string parameters
Added null reference check to RestClient constructor
Fixed tab/space issues
A couple more tab/space fixes
Merge branch 'baseurl-to-uri' of git://github.com/scottschluer/RestSharp into scottschluer-baseurl-to-uri

Conflicts:
	RestSharp.IntegrationTests/AsyncTests.cs
	RestSharp.IntegrationTests/AuthenticationTests.cs
	RestSharp.IntegrationTests/CompressionTests.cs
	RestSharp.IntegrationTests/FileTests.cs
	RestSharp.IntegrationTests/StatusCodeTests.cs
	RestSharp.IntegrationTests/oAuth1Tests.cs
	RestSharp.Tests/UrlBuilderTests.cs
	RestSharp/IRestClient.cs
	RestSharp/RestClient.cs
Merge branch 'scottschluer-baseurl-to-uri'