Add support for Swift 3.0

Tests/StencilTests/TemplateLoaderSpec.swift

@@ -0,0 +1,25 @@
+import Spectre
+import Stencil
+import PathKit
+
+
+func testTemplateLoader() {
+  describe("TemplateLoader") {
+    let path = Path(#file) + ".."  + "fixtures"
+    let loader = TemplateLoader(paths: [path])
+
+    $0.it("returns nil when a template cannot be found") {
+      try expect(loader.loadTemplate("unknown.html")).to.beNil()
+    }
+
+    $0.it("returns nil when an array of templates cannot be found") {
+      try expect(loader.loadTemplate(["unknown.html", "unknown2.html"])).to.beNil()
+    }
+
+    $0.it("can load a template from a file") {
+      if loader.loadTemplate("test.html") == nil {
+        throw failure("didn't find the template")
+      }
+    }
+  }
+}