Add syntax_checker.go

Please use this file to check if the syntax files compile.

syntax_files/syntax_checker.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+
+	"github.com/zyedidia/highlight"
+)
+
+func main() {
+	files, _ := ioutil.ReadDir(".")
+
+	hadErr := false
+	for _, f := range files {
+		if strings.HasSuffix(f.Name(), ".yaml") {
+			input, _ := ioutil.ReadFile("/Users/zachary/gocode/src/github.com/zyedidia/highlight/syntax_files/" + f.Name())
+			_, err := highlight.ParseDef(input)
+			if err != nil {
+				hadErr = true
+				fmt.Printf("%s:\n", f.Name())
+				fmt.Println(err)
+				continue
+			}
+		}
+	}
+	if !hadErr {
+		fmt.Println("No issues!")
+	}
+}