add example project

Author: ouertani

settings.gradle

@@ -5,4 +5,5 @@ include ':reactive-streams-examples'
 
 project(':reactive-streams-api').projectDir = "$rootDir/api" as File
 project(':reactive-streams-tck').projectDir = "$rootDir/tck" as File
-project(':reactive-streams-examples').projectDir = "$rootDir/examples" as File
+project(':reactive-streams-examples').projectDir = "$rootDir/examples" as File
+