API cleanup & documentation

I've started documenting more now, which is slowing things down. But when working on API, speed is not a consideration. So while documenting the API in the common package I'm doing the deep thinking necessary for the creation of a usable API.

Now I've found the Elementinterface to be to big to be anything but ugly, so I've started breaking it into more managable chunks. I've already spun off IAttributes and IEntry.

There is now a package javadoc for the common package, and I've finished the javadocs for ICommonObject, IAttributes and IEntry. I expect to upload the updated javadocs tomorrow.