Added info on Iroha support (#80)

Signed-off-by: Sara <lira.lemur@gmail.com>

README.md

@@ -14,6 +14,7 @@
 
 Hyperledger Explorer is a simple, powerful, easy-to-use, well maintained, open source utility to browse activity on the underlying blockchain network. Users have the ability to configure and build Hyperledger Explorer on MacOS and Ubuntu.
 
+**Update!** Hyperledger Explorer now can be used with [**Hyperledger Iroha**](https://github.com/hyperledger/iroha). For Iroha support, please switch to [iroha-integration](../../tree/iroha-integration) branch and read this [README](../../tree/iroha-integration/iroha) for instructions on how to use it. 
 
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