GSequencer tasks - Data exchanged between Audio and GUI

AgsAddBulkMember — add line_member object to line
AgsBlinkCellPatternCursor — toggle led object
AgsChangeIndicator — change indicator object
AgsDisplayTact — display tact object
AgsScrollOnPlay — scrolls the editor
AgsToggleLed — toggle led object
AgsTogglePatternBit — toggles the pattern
AgsUpdateBulkMember — add line_member object to line
AgsConfig — task to read simple file format
AgsConfig — task to write simple file format