Allow workflow to take in tmplbank directories

[kkacanja]

[workflow-tmpltbank]
tmpltbank-method = PREGENERATED_BANK
tmpltbank-pregenerated-bank = /home/path/to/final/bank.hdf

[workflow-splittable]
splittable-method = MANUAL_DIRECTORY

[workflow-splittable-full_data]
tmpltbank-directory = /home/path/to/full/banks/

[workflow-splittable-injections]
tmpltbank-directory = /home/path/to/inj/banks/

Syntax is as follows