Update about the drone build and amazon s3 war artifact download. Also, ...

...the default repose-ui properties/config are provided and they can be overridden by specifying a sytem property repose-ui.config.location that points to a file that has properties to be overriden
Great point Brylie! :+1: I have updated the PR based on your comments. And will merge it. If you think of better verbiage please feel free to make a PR!