add router-link prop: `exact-active-class` & router option: `linkExactActiveClass` (#1361)
add router-link prop: `exact-active-class` & router option: `linkExactActiveClass` (#1361)


Alex-Sokolov/ru.vue-router,vuejs/vue-router,vuejs/vue-router,Alex-Sokolov/ru.vue-router,Alex-Sokolov/ru.vue-router,vuejs/vue-router