RFE: Option to skip alignment

[mviereck]

I want to ask kindly for an option to skip image alignment.

I'd like to add an option to my tools to stack with your focus-stack and also other tools like enfuse.
The results of different stacking tools will be composed to one result.
For this task all result images need the same size and same alignment. Alignment is already done before stacking.

Edit: Thinking about this, I don't need this option that much myself. However, it might be a reasonable suggestion nonetheless.

[PetteriAimonen]

Some implementation tips if someone want to take a bite at this:

• In task_align.cc Task_Align::task() there are checks for the existing flags ALIGN_NO_CONTRAST, ALIGN_NO_WHITEBALANCE.
• New flag ALIGN_NO_TRANSFORM could be added and then skip the match_transform() calls. This would allow selectively enabling the color and transform steps as needed.