Fixes major intraterm interactions bug.
Fixes major intraterm interactions bug.

``AnnotatedInteractionsArray`` and ``AnnotatedInteractions2dArray`` both
did not properly post-process the intraterms interactions data structure
due to my overlooking how they were overriding the post-processing
method. As a result, they were returning empty sets instead of
interactions (or ``None`` for no interactions). This change corrects
that bug.

git-svn-id: 6391b798f55e3e4f5184bc6d113ebedc82009d5e@3853 1fbec0df-f6b4-4bca-857c-de90862b47bd

gotgenes/BiologicalProcessNetworks