RelationalTowersBuilder for Amber
Merge branch 'master' of https://github.com/pestefo/roamber
RoassalD3 package is unnecessary, so it is removed
References to ROAbstractPopup changed to ROPopup
ROPopup cleaned and simplified. It had many methods that weren't really called anywhere.
Last commited ARoassal-Interaction* packages were not exported properly by Amber ommiting a whole new class.