Imp: Sequential TRIS are parented or not to each other

[tngreene]

Suppose you have the following cases

TRIS Foo
TRIS Bar
TRIS Baz

Should become 3 meshes, root parent

ANIM 1
TRIS Wing
TRIS Flaps
TRIS Greebles

Should become Animated Wing, Flaps, Greebles under it

ANIM 1
TRIS Dog
TRIS Cat
ANIM 2
TRIS Bird

Should become entirely Animated Dog, child Cat, Animated Bird with root parent

• [ ] Unit Test
• [x] Code