Add Package.swift and move files around

Tests/StencilSpec.swift

@@ -0,0 +1,63 @@
+import Spectre
+import Stencil
+
+
+class CustomNode : NodeType {
+  func render(context:Context) throws -> String {
+    return "Hello World"
+  }
+}
+
+
+describe("Stencil") {
+  $0.it("can render the README example") {
+    let templateString = "There are {{ articles.count }} articles.\n" +
+      "\n" +
+      "{% for article in articles %}" +
+      "    - {{ article.title }} by {{ article.author }}.\n" +
+    "{% endfor %}\n"
+
+    let context = Context(dictionary: [
+      "articles": [
+        [ "title": "Migrating from OCUnit to XCTest", "author": "Kyle Fuller" ],
+        [ "title": "Memory Management with ARC", "author": "Kyle Fuller" ],
+      ]
+    ])
+
+    let template = Template(templateString:templateString)
+    let result = try template.render(context)
+
+    let fixture = "There are 2 articles.\n" +
+      "\n" +
+      "    - Migrating from OCUnit to XCTest by Kyle Fuller.\n" +
+      "    - Memory Management with ARC by Kyle Fuller.\n" +
+    "\n"
+
+    try expect(result) == fixture
+  }
+
+  $0.it("can render a custom template tag") {
+    let templateString = "{% custom %}"
+    let template = Template(templateString: templateString)
+
+    let namespace = Namespace()
+    namespace.registerTag("custom") { parser, token in
+      return CustomNode()
+    }
+
+    let result = try template.render(namespace: namespace)
+    try expect(result) == "Hello World"
+  }
+
+  $0.it("can render a simple custom tag") {
+    let templateString = "{% custom %}"
+    let template = Template(templateString: templateString)
+
+    let namespace = Namespace()
+    namespace.registerSimpleTag("custom") { context in
+      return "Hello World"
+    }
+
+    try expect(try template.render(namespace: namespace)) == "Hello World"
+  }
+}