added flattr btn

Author: dbashyal

README.md

@@ -1,4 +1,6 @@
 Magento Custom Indexer
 ======================
 
-This will create a custom indexer on magento reindex section. You can update as your requirement.
+[![Flattr this git repo](http://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=dbashyal&url=https://github.com/dbashyal&title=Github Repos&language=&tags=github&category=software)
+
+This will create a custom indexer on magento reindex section. You can update as your requirement.