Update code-base to parse "LabelSequence"

- Update code-base to parse new sequence "LabelSequence".

- Add sample input and output files for LabelSequence.
Set 'allowCoordinatesChange' in "LabelSequence"

- Set 'allowCoordinatesChange' to true to allow change of label's
  coordinates in the "LabelSequence".
Add sample JSON for label sequence without dataset

- Add sample JSON files for label sequence without dataset.
Merge branch 'zeus_rebase_02_28_13_a'