Merge branch 'hotfix/0.9.1'

Author: devlead

src/Cake.Scripting/CodeGen/CakeScriptGenerator.cs

@@ -126,11 +126,11 @@ public CakeScript Generate(FileChange fileChange)
             // Find aliases
             _log.Verbose("Finding aliases...");
             var aliases = new List<CakeScriptAlias>();
-            foreach (var reference in references)
+            foreach (var reference in references.Select(_fileSystem.GetFile))
             {
-                if (_fileSystem.Exist(reference))
+                if (reference.Exists && reference.IsClrAssembly())
                 {
-                    aliases.AddRange(_aliasFinder.FindAliases(reference));
+                    aliases.AddRange(_aliasFinder.FindAliases(reference.Path));
                 }
             }
 

src/Cake.Scripting/Reflection/GenericParameterSignature.cs

@@ -1,8 +1,9 @@
-using System;
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using Cake.Scripting.Reflection.Emitters;
 using Mono.Cecil;