Update README.md

README.md

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-# MaaS Guide
+# MaaS Guide ALPHA
 
-Guidebook to help Mobility as a Service \(MaaS\) providers.
+Guidebook to help Mobility as a Service \(MaaS\) providers. 
 
 One of the principle goals of the Mobility as a Service movement is to build a **unified marketplace** of transportation options, so that people can travel freely while experiencing a **simple and consistent user experience**.
 
@@ -16,5 +16,5 @@ This book is intended for stakeholders in transportation and MaaS providers. It
 
 ## Attribution
 
-This work is provided by the [MaaS Alliance](https://maas-alliance.eu/), a public-private partnership creating the foundations for a common approach to MaaS, unlocking the economies of scale needed for successful implementation and take-up of MaaS in Europe and beyond.
+This work is provided by the [MaaS Alliance](https://maas-alliance.eu/), a public-private partnership creating the foundations for a common approach to MaaS, unlocking the economies of scale needed for successful implementation and take-up of MaaS in Europe and beyond. MaaS Guidebook is built and maintained on voluntary basis by MaaS Alliance's working group Technology and standards. The Guidebook is currently in very early phase.