Issue 101

Shouldn't be too off... 
For @timeck the `ParsesConfigExtensionTest` class contains my take on how to make this all work within our `javax.cache.CacheManager` implementation... 
Both dirs above are blindly appended to the `project.rootDir`, so they should be relative to it. 

In this case, the value `xml/build` shoud replace the `$buildDir` variable.