Add waveform-arguments-dict and numerical-relativity file
- waveform-arguments-dict takes a dictionary or arbitrary additional arguments to pass into the waveform-generator's waveform-arguments option. This should allow the functionality proposed in !348 (closed) without needing an explicit definition for every option.
- numerical-relativity-file points to a file to inject. Note, this will not function correctly until !845 is merged.
- Also fixes a bug in the
--verboseoption for debugging