README update to make github page also reflect that Mainnet is launch…

…ed (#2439)

* README update to make github page also reflect that Mainnet is launched

* MainNet -> mainnet

README.md

@@ -1,13 +1,16 @@
-[![Build Status](https://travis-ci.org/mimblewimble/grin.svg?branch=master)](https://travis-ci.org/mimblewimble/grin) [![Gitter chat](https://badges.gitter.im/grin_community/Lobby.png)](https://gitter.im/grin_community/Lobby) [![Codecov coverage status](https://codecov.io/gh/mimblewimble/grin/branch/master/graph/badge.svg)](https://codecov.io/gh/mimblewimble/grin)
+[![Build Status](https://travis-ci.org/mimblewimble/grin.svg?branch=master)](https://travis-ci.org/mimblewimble/grin)
+[![Gitter chat](https://badges.gitter.im/grin_community/Lobby.png)](https://gitter.im/grin_community/Lobby)
+[![Support chat](https://badges.gitter.im/grin_community/Lobby.png)](https://gitter.im/grin_community/support)
+[![Codecov coverage status](https://codecov.io/gh/mimblewimble/grin/branch/master/graph/badge.svg)](https://codecov.io/gh/mimblewimble/grin)
 
 # Grin
 
 Grin is an in-progress implementation of the MimbleWimble protocol. Many characteristics are still undefined but the following constitutes a first set of choices:
 
-  * Clean and minimal implementation, aiming to stay as such.
+  * Clean and minimal implementation, and aiming to stay as such.
   * Follows the MimbleWimble protocol, which provides great anonymity and scaling characteristics.
-  * Cuckoo Cycle proof of work.
-  * Relatively fast block time (a minute).
+  * Cuckoo Cycle proof of work in two variants named Cuckaroo (ASIC-resistant) and Cuckatoo (ASIC-targeted).
+  * Relatively fast block time: one minute.
   * Fixed block reward over time with a decreasing dilution.
   * Transaction fees are based on the number of Outputs created/destroyed and total transaction size.
   * Smooth curve for difficulty adjustments.
@@ -16,7 +19,7 @@ To learn more, read our [introduction to MimbleWimble and Grin](doc/intro.md).
 
 ## Status
 
-Grin is still an infant, much is left to be done and [contributions](CONTRIBUTING.md) are welcome (see below). Check our [mailing list archives](https://lists.launchpad.net/mimblewimble/) for the latest status.
+Grin is live with mainnet. Still, much is left to be done and [contributions](CONTRIBUTING.md) are welcome (see below). Check our [mailing list archives](https://lists.launchpad.net/mimblewimble/) for the latest status.
 
 ## Contributing