GUI tasks

AgsAddBulkMember — add line_member object to line
AgsAddLineMember — add line_member object to line
AgsAddSequencerEditorJack — add line_member object to line
AgsAddSoundcardEditorSink — add sink to distributed manager
AgsBlinkCellPatternCursor — toggle led object
AgsChangeIndicator — change indicator object
AgsChangeTact
AgsDisplayTact — display tact object
AgsRemoveSequencerEditorJack — remove line_member object to line
AgsRemoveSoundcardEditorSink — remove sink of distributed manager
AgsResizeEditor — Resize audio channels or pads.
AgsScrollOnPlay — scrolls the editor
AgsSimpleFileRead — task to read simple file format
AgsSimpleFileWrite — task to write simple file format
AgsToggleLed — toggle led object
AgsUpdateBulkMember — add line_member object to line