Merge remote-tracking branch 'devel/testing_default_threshold'
first passes at fixg this issue
i think I got the flip axis right
got a working one! all ctest pass
Merge branch 'issue_637_inverted_axis_updated'
Make sure animation speed isn't too slow

Previously, animations were set so the speed could be very slow.  Now,
it's at least one frame every two seconds.
almost got Jeff issue in
removed print statements
fixed Jeff bug when default and missing
reverting .vt files to default
Added test for this issue
Merge branch 'set-animation-speed-threshold-rebased'
Merge remote-tracking branch 'devel/issue_637_tweak_for_missings'