Cleans up display of Active Tree. Handles drawing relationship lines in a more concise manner. Resolves an untracked issue with changing active member status of a selected node and not being able to apply. Resolves another untracked issue of labels not reverting to default color after the node no longer has active member status.
Merge pull request #41 from Mctalian/patch_27

Resolves Issue #27: Active Tree now displays correctly.