Spin-off parts as plugins.

* Add support for config profiles.
* Remove rubytest command, along with rake task.
* Bump version to 0.7.0.
Add configuration example.
Fix reference to config, and be able to apply a hash.
Restore Runner initialize.
Merge branch 'master' of github.com:rubyworks/rubytest

Conflicts:
	lib/rubytest/config.rb
	lib/rubytest/runner.rb