Strong-name both the main and test projects

It's not clear whether SharpCompress.Test.Portable (as referenced
in AssemblyInfo.cs) still exists, but build.ps1 certainly works.

src/SharpCompress/AssemblyInfo.cs

@@ -4,6 +4,22 @@ using System.Runtime.CompilerServices;
 
 [assembly: AssemblyTitle("SharpCompress")]
 [assembly: AssemblyProduct("SharpCompress")]
-[assembly: InternalsVisibleTo("SharpCompress.Test")]
-[assembly: InternalsVisibleTo("SharpCompress.Test.Portable")]
-[assembly: CLSCompliant(true)]
+[assembly: InternalsVisibleTo("SharpCompress.Test" + SharpCompress.AssemblyInfo.PublicKeySuffix)]
+[assembly: InternalsVisibleTo("SharpCompress.Test.Portable"  + SharpCompress.AssemblyInfo.PublicKeySuffix)]
+[assembly: CLSCompliant(true)]
+
+namespace SharpCompress
+{
+    /// <summary>
+    /// Just a static class to house the public key, to avoid repetition.
+    /// </summary>
+    internal static class AssemblyInfo
+    {
+        internal const string PublicKeySuffix =
+            ",PublicKey=002400000480000094000000060200000024000052534131000400000100010059acfa17d26c44" +
+            "7a4d03f16eaa72c9187c04f16e6569dd168b080e39a6f5c9fd00f28c768cd8e9a089d5a0e1b34c" +
+            "cd971488e7afe030ce5ce8df2053cf12ec89f6d38065c434c09ee6af3ee284c5dc08f44774b679" +
+            "bf39298e57efe30d4b00aecf9e4f6f8448b2cb0146d8956dfcab606cc64a0ac38c60a7d78b0d65" +
+            "d3b98dc0";
+    }
+}

src/SharpCompress/project.json

@@ -13,7 +13,8 @@
     },
     "buildOptions": {
         "warningsAsErrors": true,
-        "allowUnsafe": true
+        "allowUnsafe": true,
+        "keyFile": "../../SharpCompress.snk"
     },
     "frameworks": {
         "net35": {

test/SharpCompress.Test/project.json

@@ -1,4 +1,8 @@
 {
+    "buildOptions": {
+        "keyFile": "../../SharpCompress.snk"
+    },
+
     "testRunner": "xunit",
 
     "frameworks": {