Detect when an application is running in development (by the presence
of a build file) and automatically add a 'development' profile.
Additional detectors can be developed by implementing the
`ProfileDetector` interface and registering with the `SpringApplication`
Fixes gh-296
Long package names are really unnecessary in samples and they
just clutter things up. Also Spring Loaded doesn't work with
org.sfw packages, so to demo that technology you need a
different package name.
