extracted IdentifierReferenceResolver class, simplified IdentifierReferenceListener

Author: retailcoder

Rubberduck.Parsing/Rubberduck.Parsing.csproj

@@ -67,6 +67,7 @@
     <Compile Include="IParseResultProvider.cs" />
     <Compile Include="IRubberduckParser.cs" />
     <Compile Include="Symbols\ExceptionErrorListener.cs" />
+    <Compile Include="Symbols\IdentifierReferenceResolver.cs" />
     <Compile Include="Symbols\SyntaxErrorException.cs" />
     <Compile Include="Logging\LoggingConfigurator.cs" />
     <Compile Include="Nodes\CommentNode.cs" />