Adds mustache tests

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "mustache"]
+	path = mustache
+	url = git://github.com/mustache/spec.git

mustache_test.go

@@ -0,0 +1,79 @@
+package raymond
+
+import (
+	"io/ioutil"
+	"path"
+	"testing"
+
+	"gopkg.in/yaml.v2"
+)
+
+// @todo Replace that by adding yaml tags in raymondTest struct
+type mustacheTest struct {
+	Name     string
+	Desc     string
+	Data     interface{}
+	Template string
+	Expected string
+	Partials map[string]string
+}
+
+type mustacheTestFile struct {
+	Overview string
+	Tests    []mustacheTest
+}
+
+func testsFromMustacheFile(fileName string) []raymondTest {
+	result := []raymondTest{}
+
+	fileData, err := ioutil.ReadFile(path.Join("mustache", "specs", fileName))
+	if err != nil {
+		panic(err)
+	}
+
+	var testFile mustacheTestFile
+	if err := yaml.Unmarshal(fileData, &testFile); err != nil {
+		panic(err)
+	}
+
+	for _, mustacheTest := range testFile.Tests {
+		test := raymondTest{
+			name:   mustacheTest.Name,
+			input:  mustacheTest.Template,
+			data:   mustacheTest.Data,
+			output: mustacheTest.Expected,
+		}
+
+		result = append(result, test)
+	}
+
+	return result
+}
+
+func TestMustacheComments(t *testing.T) {
+	launchRaymondTests(t, testsFromMustacheFile("comments.yml"))
+}
+
+func TestMustacheDelimiters(t *testing.T) {
+	launchRaymondTests(t, testsFromMustacheFile("delimiters.yml"))
+}
+
+func TestMustacheInterpolation(t *testing.T) {
+	launchRaymondTests(t, testsFromMustacheFile("interpolation.yml"))
+}
+
+func TestMustacheInverted(t *testing.T) {
+	launchRaymondTests(t, testsFromMustacheFile("inverted.yml"))
+}
+
+// func TestMustachePartials(t *testing.T) {
+// 	launchRaymondTests(t, testsFromMustacheFile("partials.yml"))
+// }
+
+func TestMustacheSections(t *testing.T) {
+	launchRaymondTests(t, testsFromMustacheFile("sections.yml"))
+}
+
+// func TestMustacheLambdas(t *testing.T) {
+// 	launchRaymondTests(t, testsFromMustacheFile("~lambdas.yml"))
+// }