Switch to enable/disable bonus-disc-skipping

[guFalcon]

A switch in the config file that enables you to turn bonus-disc skipping or not. I would find that very useful.

# This switch determines if bulkmakemkv will skip bonus-discs in general.
# A bonus disc is defined by containing the string '(bonus)' in its iso-file-name.
skipbonusdiscs = true
#skipbonusdiscs = false

You then could override this global setting by adding a '+' or '-' in front of the 'bonus tag' that denotes a bonus-disc like so:
Movie:
The Shining.iso
Bonus disc:
The Shining (bonus).iso
Bonus disc that doesn't get ripped even if you've specified to rip bonus discs in the config:
The Shining (-bonus).iso
Bonus disc that will get ripped even if you've specified not to rip bonus discs in the config:
The Shining (+bonus).iso