Add convenience methods for writing values to the Console (#1)

* Remove IAnsiConsole.WriteLine
* Add WriteLine extensions for IAnsiConsole
* Add Write extensions for IAnsiConsole
* Add Write and WriteLine method for AnsiConsole

Author: patriksvensson

README.md

@@ -45,7 +45,6 @@ AnsiConsole.WriteLine("Hello World!");
 
 AnsiConsole.Reset();
 AnsiConsole.WriteLine("Good bye!");
-AnsiConsole.WriteLine();
 ```
 
 If you want to get a reference to the default `IAnsiConsole`, 

src/Sample/Program.cs

@@ -1,9 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Reflection;
-using System.Runtime.InteropServices;
 using Spectre.Console;
 
 namespace Sample
@@ -17,7 +12,7 @@ public static void Main(string[] args)
             AnsiConsole.Style = Styles.Underline | Styles.Bold;
             AnsiConsole.WriteLine("Hello World!");
             AnsiConsole.Reset();
-            AnsiConsole.WriteLine($"Capabilities: {AnsiConsole.Capabilities}");
+            AnsiConsole.WriteLine("Capabilities: {0}", AnsiConsole.Capabilities);
             AnsiConsole.WriteLine($"Width={AnsiConsole.Width}, Height={AnsiConsole.Height}");
             AnsiConsole.WriteLine("Good bye!");
             AnsiConsole.WriteLine();
@@ -41,7 +36,7 @@ public static void Main(string[] args)
             console.WriteLine("Hello World!");
             console.ResetColors();
             console.ResetStyle();
-            console.WriteLine($"Capabilities: {console.Capabilities}");
+            console.WriteLine("Capabilities: {0}", AnsiConsole.Capabilities);
             console.WriteLine($"Width={AnsiConsole.Width}, Height={AnsiConsole.Height}");
             console.WriteLine("Good bye!");
             console.WriteLine();

src/Spectre.Console.Tests/AnsiConsoleFixture.cs

@@ -11,13 +11,13 @@ public sealed class AnsiConsoleFixture : IDisposable
 
         public string Output => _writer.ToString();
 
-        public AnsiConsoleFixture(ColorSystem system)
+        public AnsiConsoleFixture(ColorSystem system, AnsiSupport ansi = AnsiSupport.Yes)
         {
             _writer = new StringWriter();
 
             Console = AnsiConsole.Create(new AnsiConsoleSettings
             {
-                Ansi = AnsiSupport.Yes,
+                Ansi = ansi,
                 ColorSystem = (ColorSystemSupport)system,
                 Out = _writer,
             });