I have included a dummy accuracy score function. The current version is based...

I have included a dummy accuracy score function. The current version is based on the shadowed attribute of source words. This also means that it will only function properly after this attribute has been assigned to its correct value for every source word.

The accuracy function might still require changing depending on any future changes of project structure. But since I only added the function on top of the current master branch. It should merge without any errors.