fix some stylecop issues

Author: tpluscode

src/JsonLD.Entities/ContextNotFoundException.cs

@@ -5,6 +5,7 @@ namespace JsonLD.Entities
     /// <summary>
     /// Represents errors which occur if JSON-LD @context cannot be found for a given type
     /// </summary>
+    [Serializable]
     public class ContextNotFoundException : Exception
     {
         private readonly Type _entityType;

src/JsonLD.Entities/JsonLdContractResolver.cs

@@ -27,6 +27,9 @@ static JsonLdContractResolver()
             ListTypes.Add(typeof(IList<>));
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JsonLdContractResolver"/> class.
+        /// </summary>
         public JsonLdContractResolver()
         {
             NamingStrategy = JsonLdNamingStrategy;

src/JsonLD.Entities/JsonLdNamingStrategy.cs

@@ -21,4 +21,4 @@ protected override string ResolvePropertyName(string propertyName)
             return base.ResolvePropertyName(propertyName);
         }
     }
-}
+}

src/JsonLD.Entities/Properties/AssemblyInfo.cs

@@ -7,5 +7,7 @@
 [assembly: AssemblyCopyright("Copyright © 2014-2016 Tomasz Pluskiewicz")]
 [assembly: AssemblyCompany("Tomasz Pluskiewicz")]
 
+[assembly: ComVisible(false)]
+
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("ee2b4e4a-32c1-4636-9dc0-09fa135eed99")]