Javadoc multi project/subproject strucuture #536

Building the javadocs has made clear there is no utility in managing what is effectively many subprojects (mvn's modules). There roughly 17 library modules and >20 detector reconstruction modules. In javadocs, there appears to be no linking between these. For example, band engine does not link to org.jlab.clas.reco.ReconstructionEngine.

Perhaps I am missing the benefits of having these divisions...