#16 auto filenaming bug

[Marlon Schumacher]

Auto-renaming function uses system time up to seconds resolution as parts of the filename; when batch processing files this can lead to files being overwritten when rendered in the same second. Temporal granularity used for filenaming not adequate/high enough.

[Marlon Schumacher]

Suggestions:
a) use a finer internal timer, e.g. (get-internal-real-time) or (get-internal-run-time)
b) use a counter (e.g. when processing lists, use a counter to iterate and auto-name object-oriented)

[Marlon Schumacher]

Fixed in 968eaa1. Now uses optional millisecond in filename + optional suffix.