Using router-link slots for header link indicators. Added release cache to store.

assets/js/releases/mutations.js

@@ -1 +1,14 @@
-export default {};
+import Vue from 'vue';
+
+function setCache(state, { target, releases }) {
+    Vue.set(state.cache, target, releases);
+}
+
+function deleteCache(state, target) {
+    Vue.delete(state.cache, target);
+}
+
+export default {
+    setCache,
+    deleteCache,
+};

assets/js/releases/state.js

@@ -1 +1,3 @@
-export default {};
+export default {
+    cache: {},
+};