Metamorph: clean up image names for plate data
Metamorph: correct image names for multiple series per position
Metamorph: use the stage position index in the image name

...instead of the series index.
merge dev_4_4 -D org -I include -E exclude: PR 673 (Make configuration file suffix configurable)
merge dev_4_4 -D org -I include -E exclude: PR 707 (Metamorph image names)