Don't throw DeserializationException for U+007F to U+009F

These are acceptable characters per RFC4627 section 2.5:

> All Unicode characters may be placed within the
> quotation marks except for the characters that must be escaped:
> quotation mark, reverse solidus, and the control characters (U+0000
> through U+001F).

Author: jscheid

src/JsonFx.Tests/Json/JsonTokenizerTests.cs

@@ -425,6 +425,22 @@ public void GetTokens_StringEscapedChars_ReturnsStringToken()
 			Assert.Equal(expected, actual);
 		}
 
+		[Fact]
+		[Trait(TraitName, TraitValue)]
+		public void GetTokens_HighControl_Accepted()
+		{
+			const string input = "\"\u0082\"";
+			var expected = new []
+			{
+				ModelGrammar.TokenPrimitive("\u0082")
+			};
+
+			var tokenizer = new JsonReader.JsonTokenizer();
+			var actual = tokenizer.GetTokens(input).ToArray();
+
+			Assert.Equal(expected, actual);
+		}
+
 		[Fact]
 		[Trait(TraitName, TraitValue)]
 		public void GetTokens_StringImproperlyEscapedChars_ReturnsStringTokenWithSimpleChars()

src/JsonFx/Utils/CharUtility.cs

@@ -88,9 +88,7 @@ public static bool IsWhiteSpace(char ch)
 		/// <returns></returns>
 		public static bool IsControl(char ch)
 		{
-			return
-				(ch <= '\u001F') ||
-			    ((ch >= '\u007F') && (ch <= '\u009F'));
+			return (ch <= '\u001F');
 		}
 
 		/// <summary>