Use unicode compat slug engine

vendor/github.com/rainycape/unidecode/decode.go

@@ -0,0 +1,41 @@
+package unidecode
+
+import (
+	"compress/zlib"
+	"encoding/binary"
+	"io"
+	"strings"
+)
+
+var (
+	transliterations [65536][]rune
+	transCount       = rune(len(transliterations))
+	getUint16        = binary.LittleEndian.Uint16
+)
+
+func decodeTransliterations() {
+	r, err := zlib.NewReader(strings.NewReader(tableData))
+	if err != nil {
+		panic(err)
+	}
+	defer r.Close()
+	tmp1 := make([]byte, 2)
+	tmp2 := tmp1[:1]
+	for {
+		if _, err := io.ReadAtLeast(r, tmp1, 2); err != nil {
+			if err == io.EOF {
+				break
+			}
+			panic(err)
+		}
+		chr := getUint16(tmp1)
+		if _, err := io.ReadAtLeast(r, tmp2, 1); err != nil {
+			panic(err)
+		}
+		b := make([]byte, int(tmp2[0]))
+		if _, err := io.ReadFull(r, b); err != nil {
+			panic(err)
+		}
+		transliterations[int(chr)] = []rune(string(b))
+	}
+}