Remove hard-wired message for 'Give up' step

- Remove hard-wired message for the 'Give up' step in the best-fit
  sequence.
Positively test best-fit's giveUp prompt is used
WIP - first cut at handling maxAttempts.

For [#42915745] - this has the basic outline but doesn't handle incorrect steps properly.
Correcting misspelling.

It was bothering me. Sorry.
Notes for next steps
Was this unclosed tag intentional?
Making step addition max-tries-safe

[#42915745] This should do the trick.
Fixing misspelling
maxTries for line construction sequences

[#42915745] This time in Coffeescript...
Removing reflexive-but-vestigal semicolons
Compiled javascript from maxTries changes for LineConstructionSequence
Missing initialization of counter
Fixes for line construction sequence
Compiled fixes
New test input/output for line construction sequences

[#42915745]
Fix typo
- Fix typo
Add support for Label and LabelSet in annotations

- Add support for Label and LabelSet in annotations.
Add sample JSON files for author created labels

- Add sample JSON files for author created labels.
Check 'labelSets' existence in sequence

- Check 'labelSets' existence in sequence.
Update runtimeSchema for Label and LabelSet

- Update runtimeSchema for Label and LabelSet.