Handle timestamp based versions in kruntime itself

- This is useful when testing privates of the runtime itself.

build/_k-generate-projects.shade

@@ -341,8 +341,25 @@ functions
 
             private static string GetProjectKTargets(string packagesDir)
             {
+                Func<string, long> getVersion = version => {
+                    var dash = version.LastIndexOf('-');
+
+                    if(dash != -1)
+                    {
+                        var lastToken = version.Substring(dash + 1);
+
+                        if(lastToken.StartsWith("t"))
+                        {
+                            return Int64.Parse(lastToken.Substring(1));
+                        }
+
+                        return Int64.Parse(lastToken);
+                    }
+                    return Int64.MaxValue;
+                };
+
                 var projectK = Directory.GetDirectories(packagesDir, "ProjectK*")
-                                           .Select(p => new { Path = p, Build = Int32.Parse(p.Substring(p.LastIndexOf('-') + 1)) })
+                                           .Select(p => new { Path = p, Build = getVersion(p) })
                                            .OrderByDescending(p => p.Build)
                                            .FirstOrDefault();
 

build/_k.shade

@@ -16,9 +16,26 @@ command=''
 nuget-install package='ProjectK' outputDir='packages' extra='-pre' once='ProjectK-NuGet'
 
 @{
+    Func<string, long> getVersion = version => {
+        var dash = version.LastIndexOf('-');
+
+        if(dash != -1)
+        {
+            var lastToken = version.Substring(dash + 1);
+
+            if(lastToken.StartsWith("t"))
+            {
+                return Int64.Parse(lastToken.Substring(1));
+            }
+
+            return Int64.Parse(lastToken);
+        } 
+        return Int64.MaxValue;
+    };
+
     string packagesDir = Path.Combine(Directory.GetCurrentDirectory(), "packages"),
            projectKDir = Directory.EnumerateDirectories(packagesDir, "ProjectK*")
-                                  .OrderByDescending(p => Int32.Parse(p.Substring(p.LastIndexOf('-') + 1)))
+                                  .OrderByDescending(getVersion)
                                   .First();
     
 }