Provide the ability to have pluggable auto-generation names

[jadrake75]

The current generation algorithm works by taking the current ISO Date and adding a counter to the end of it. Some users have requested the ability to specify a generation value using characters like YYYY and MM etc. Would need a way to denote generative characters (perhaps like {YYYY} vs. static fixed text like Y)

Tokens for
Dates, Countries, other?

Should be part of a settings/options dialog and applied to any images generated.