Add Package.swift and move files around

Tests/LexerSpec.swift

@@ -0,0 +1,48 @@
+import Spectre
+import Stencil
+
+
+describe("Lexer") {
+  $0.it("can tokenize text") {
+    let lexer = Lexer(templateString: "Hello World")
+    let tokens = lexer.tokenize()
+
+    try expect(tokens.count) == 1
+    try expect(tokens.first) == Token.Text(value: "Hello World")
+  }
+
+  $0.it("can tokenize a comment") {
+    let lexer = Lexer(templateString: "{# Comment #}")
+    let tokens = lexer.tokenize()
+
+    try expect(tokens.count) == (1)
+    try expect(tokens.first) == Token.Comment(value: "Comment")
+  }
+
+  $0.it("can tokenize a variable") {
+    let lexer = Lexer(templateString: "{{ Variable }}")
+    let tokens = lexer.tokenize()
+
+    try expect(tokens.count) == 1
+    try expect(tokens.first) == Token.Variable(value: "Variable")
+  }
+
+  $0.it("can tokenize a mixture of content") {
+    let lexer = Lexer(templateString: "My name is {{ name }}.")
+    let tokens = lexer.tokenize()
+
+    try expect(tokens.count) == 3
+    try expect(tokens[0]) == Token.Text(value: "My name is ")
+    try expect(tokens[1]) == Token.Variable(value: "name")
+    try expect(tokens[2]) == Token.Text(value: ".")
+  }
+
+  $0.it("can tokenize two variables without being greedy") {
+    let lexer = Lexer(templateString: "{{ thing }}{{ name }}")
+    let tokens = lexer.tokenize()
+
+    try expect(tokens.count) == 2
+    try expect(tokens[0]) == Token.Variable(value: "thing")
+    try expect(tokens[1]) == Token.Variable(value: "name")
+  }
+}