Fix source specification for signed version

Fixes #48

Author: atifaziz

NCrontab.Signed/NCrontab.Signed.csproj

@@ -5,7 +5,7 @@
     <Copyright>Copyright © 2008 Atif Aziz. All rights reserved. Portions Copyright © 2001 The OpenSymphony Group. All rights reserved.</Copyright>
     <AssemblyTitle>NCrontab (Signed)</AssemblyTitle>
     <NeutralLanguage>en-US</NeutralLanguage>
-    <VersionPrefix>3.3.1</VersionPrefix>
+    <VersionPrefix>3.3.2</VersionPrefix>
     <Authors>Atif Aziz</Authors>
     <TargetFrameworks>net35;netstandard1.0;netstandard2.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);SIGNED</DefineConstants>
@@ -34,6 +34,7 @@
 
   <ItemGroup>
     <Compile Include="..\SolutionInfo.cs" />
+    <Compile Include="..\NCrontab\*.cs" Exclude="bin\**;obj\**;**\*.xproj;packages\**" />
     <None Include="..\COPYING.txt" Pack="true" PackagePath="$(PackageLicenseFile)" />
   </ItemGroup>