Create ionic es toc

chapters-en/ionic-es.md

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+Ionic & ElasticSearch build O2O application
+===
+
+Overview
+---
+
+### Background
+
+### ShowCase
+
+### Architecture Design
+
+Steps
+---
+
+### Step 1: Django GIS
+
+### Step 2: config haystack
+
+### Step 3: Django Haystack Model
+
+### Step 4: create search index
+
+### Step 5: create page
+
+### Step 6: Ionic ElasticSearch Service
+
+### Step 7: Ionic OpenLayer Map
+
+Practise
+---