Add flag to turn on/off "special workflow" detection in auto config script

[CKrawczyk]

This came up recently with workflow 16890 (v4.9) task 29. The task is set up as a drawing task with several line tools, each tool has its own text task as a subtask. The workflow config script detects a line tool with text subtask as a transcription task, but that makes the assumption that there is only one drawing tool. As there are multiple tools in this case this is a false positive and should not be marked as a transaction task.

In the (near) future there will be a transcription tasks type that can be detected separate from other configs, but for backwards compatibility with projects like ASM, these kinds of auto-detections should not be removed from the code. I expect the easiest thing to do is add a command-line flag for turning on/off "special workflow" detection. The default should be off as these special workflows are less likely to be the case than typical setups.

[CKrawczyk]

List of special workflows that are auto-detected:

• Shakespeare's World
  • tasks == {'init': {'question': 'init.question', 'type': 'single', 'answers': []}}
• AnnoTate
  • tasks T0's name starts with annotate-
• poly_line_text_extractor/reducer
  • polygon drawing tool with text task as first subtask
• line_text_extractor/reducer
  • line drawing tool with text task as first subtask