make example executable, add shebang.
make example server executable, add shebang.\nNow you can start it with 'bundle exec example/example_server.rb'.
indent response in sinatra example_server code.
add routes with non-success responses to example_server
Prepare test server for tests, issue apotonick/roar#106 .
Merge branch 'master' of https://github.com/fwolfst/roar