Create README.md

README.md

+# destream-blockchain
+Blockchain implementation of Streamer's Financial Ecosystem
+
+## Getting started
+### Prerequisites
+[.NET CORE 2.1](https://www.microsoft.com/net/download/dotnet-core/2.1)
+
+### Running a node
+Build
+```
+git clone https://github.com/DeStream-dev/destream-blockchain.git
+cd destream-blockchain/Sources/
+dotnet build
+```
+Run
+```
+cd DeStream.DeStreamD
+dotnet run
+```