This commit makes extensive changes to the structure of the code. It
introduces a number of separate packages to provide better separation
of the various areas of functionality. Alongside this change the project
has been renamed from spring-restdocs-core to spring-restdocs.
The build has been improved to provide support for building the samples
from the main build using the buildSamples task. While this change has
been made, the samples remain standalone projects so that their
configuration is not dependent on the main project’s build. Running
buildSamples will build the samples using both Maven and Gradle.
All of the main project’s classes now have javadoc and licence/copyright
headers.
