First cut of CZML vector support.
Merge branch 'master' into vectors
Specs, cleanup, and fixes for CZML vectors.
Remove unneeded scratch objects and clean up some getValue usage.

In reality, MockProperty needs to be overhauled and maybe replaced, but that's outside the scope of this pull.
Whoops. Fix bad submit.
Fix failing test.
Merge pull request #806 from AnalyticalGraphicsInc/vectors

CZML Vectors