more prominent old docs link

Author: yyx990803

docs/LANGS.md

@@ -1 +1,2 @@
 * [English](en/)
+* [0.7 Docs](old/)

docs/en/SUMMARY.md

@@ -1,6 +1,6 @@
 # vue-router 2
 
-> Note: vue-router@2.x only works with Vue 2.x. The docs for the 1.x router is [here](https://github.com/vuejs/vue-router/tree/1.0/docs/en).
+> Note: vue-router@2.x only works with Vue 2.x.
 
 - [Looking for 0.7 Docs?](https://github.com/vuejs/vue-router/tree/1.0/docs/en)
 - [Release Notes](https://github.com/vuejs/vue-router/releases)

docs/old/README.md

@@ -0,0 +1,5 @@
+# 0.7 Docs
+
+- [English](https://github.com/vuejs/vue-router/tree/1.0/docs/en)
+- [Chinese](https://github.com/vuejs/vue-router/tree/1.0/docs/zh-cn)
+- [Japanese](https://github.com/vuejs/vue-router/tree/1.0/docs/ja)

docs/old/SUMMARY.md

@@ -0,0 +1,5 @@
+# 0.7 Docs
+
+- [English](https://github.com/vuejs/vue-router/tree/1.0/docs/en)
+- [Chinese](https://github.com/vuejs/vue-router/tree/1.0/docs/zh-cn)
+- [Japanese](https://github.com/vuejs/vue-router/tree/1.0/docs/ja)