Pulled each couple's html in the tree out into a component fs-couple-card.
merge
Completed initial refactoring of the tree html into multiple directives.  This is an intermediate state.
merge
Cadence point in refactoring tree.html into components.  Not done, but have a better organization.
Initial refactoring of tree is complete.  fsTree and fsTreeNode are current.  I expect further splitting as we go forward.  For now, the desired person is passed all the way down to the scope of the fsTreeNode.