Fix #22: add static fields to ResolvedTypeWithMembers

This pull request adds static fields support to ResolvedTypeWithMembers. I'm sorry it doesn't include a test for that, as I haven't had time to look at the existing tests already existing and creating the appropriate additions :(

Also in order to adapt the project to work in my environment I changed the pom.xml file - and I'm not sure how to create a pull request that only contains "ResolvedTypeWithMembers.java" and not the pom.xml - so obviously you don't need to merge the pom.xml changes, only the "ResolvedTypeWithMembers.java" file.