Updating readme

Author: codeapologist

README.md

@@ -1,2 +1,18 @@
 # Dapper.Testability.Adapters
 
+## Basic Usage
+
+Create a connection adapter
+
+```csharp
+
+var connectionAdapter = new ConnectionAdapter(new SqlConnection(connectionString));
+        
+```
+Execute Dapper queries and sql commands normally
+
+```
+
+     var person = await connectionAdapter.QueryAsync<Person>(sql, new {Id});
+
+ ```