add echoesworks en

chapters-en/echoesworks.md

@@ -0,0 +1,27 @@
+Build Web Slide Framework
+===
+
+Overview
+---
+
+### Background
+
+### AC
+
+Steps
+---
+
+### Step 1: basic slide function
+
+### Step 2: parse markdown
+
+### Step 3: event handle
+
+### Step 4: parse time subs
+
+### Step 5: add processbar
+
+### Step 6: sync
+
+Practise
+---