Integrate with Eclipse

[joebandenburg]

We should provide an Eclipse plugin to help with development of Cuppa tests.

None of the core contributors to Cuppa use Eclipse so we are looking for help from the community to do this.

We should build it in an iterative way, so the first version should be relatively simple and act to demonstrate that we can do a release to the Eclipse plugin repository.

See the IntelliJ plugin for ideas.