Updated the Readme to fix the link to the examples

It looks like the location of the examples has changed since the readme was created. I found some examples on a similar file path, so think that was the desired location. 

Updated to [https://github.com/evrythng/evrythng-java-sdk/tree/master/evrythng-java-wrapper/src/main/java/com/evrythng/java/wrapper/examples]