add app-specific start-up banner, update readme with dockerhub shield…

… and link to wiki

README.md

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-# Apache Fineract CN Accounting [![Build Status](https://api.travis-ci.com/apache/fineract-cn-accounting.svg?branch=develop)](https://travis-ci.com/apache/fineract-cn-accounting)
+# Apache Fineract CN Accounting [![Build Status](https://api.travis-ci.com/apache/fineract-cn-accounting.svg?branch=develop)](https://travis-ci.com/apache/fineract-cn-accounting) [![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/apache/fineract-cn-accounting)](https://hub.docker.com/r/apache/fineract-cn-accounting/builds)
 
 The accounting service tracks journal entries in accounts, and accounts in ledgers.
+[Read more](https://cwiki.apache.org/confluence/display/FINERACT/Fineract+CN+Project+Structure#FineractCNProjectStructure-accounting).
+
 
 ## Abstract
 Apache Fineract CN is an application framework for digital financial services, a system to support nationwide and cross-national financial transactions and help to level and speed the creation of an inclusive, interconnected digital economy for every nation in the world.

service/src/main/resources/banner.txt

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+  _____ _                           _         ____ _   _ 
+ |  ___(_)_ __   ___ _ __ __ _  ___| |_      / ___| \ | |
+ | |_  | | '_ \ / _ \ '__/ _` |/ __| __|____| |   |  \| |
+ |  _| | | | | |  __/ | | (_| | (__| ||_____| |___| |\  |
+ |_|   |_|_| |_|\___|_|  \__,_|\___|\__|     \____|_| \_|
+     _                             _   _                 
+    / \   ___ ___ ___  _   _ _ __ | |_(_)_ __   __ _     
+   / _ \ / __/ __/ _ \| | | | '_ \| __| | '_ \ / _` |    
+  / ___ \ (_| (_| (_) | |_| | | | | |_| | | | | (_| |    
+ /_/   \_\___\___\___/ \__,_|_| |_|\__|_|_| |_|\__, |    
+                                               |___/