closes #3051

updated lru to latest
created new files posts/cache.js posts/parse.js posts/edit.js

src/posts/cache.js

@@ -0,0 +1,11 @@
+var	LRU = require('lru-cache');
+
+var cache = LRU({
+	max: 1048576,
+	length: function (n) { return n.length; },
+	maxAge: 1000 * 60 * 60
+});
+
+
+
+module.exports = cache;