Revise filtering of problematic elements: Remove annot elements specifically of type bracket, which break rendering
Merge branch 'annot-bracket'

* annot-bracket:
  Revise filtering of problematic elements: Remove annot elements specifically of type bracket, which break rendering
Created tests for blank staves
Updated links in test list
Merge branch 'concordance'

* concordance:
  Updated links in test list
Reorganized constants for defining var_type options
Merge branch 'concordance' into blank-staves
Corrected name overlooked in compact viewer
Correct symbol for sharp; support naturals
Merge branch 'upstream'

* upstream:
  Correct symbol for sharp; support naturals
Logic to show blank staves similarly to reconstructions
Edit test case for blank staves to give duration, as expected
Hack to show nicer listing for blank staves
Added tests for reconstruction and blank staves in same piece
Merge branch 'blank-staves'

* blank-staves:
  Added tests for reconstruction and blank staves in same piece
  Hack to show nicer listing for blank staves
  Edit test case for blank staves to give duration, as expected
  Logic to show blank staves similarly to reconstructions
  Reorganized constants for defining var_type options
  Created tests for blank staves
Merge branch 'concordance'

* concordance:
  Corrected name overlooked in compact viewer