Add Package.swift and move files around

Tests/TemplateSpec.swift

@@ -0,0 +1,12 @@
+import Spectre
+import Stencil
+
+
+describe("Template") {
+  $0.it("can render a template from a string") {
+    let context = Context(dictionary: [ "name": "Kyle" ])
+    let template = Template(templateString: "Hello World")
+    let result = try template.render(context)
+    try expect(result) == "Hello World"
+  }
+}