OSLC to newcomers

[andrew]

Links to some “hello world” REST clients:

• https://github.com/OSLC/lyo-samples/blob/master/oslc4j-client-samples/src/main/java/org/eclipse/lyo/oslc4j/client/samples/RMSample.java#L85
• https://github.com/OSLC/refimpl/blob/master/src/client-toolchain/src/main/kotlin/Main.kt#L68