Rubin/Roman filters, Synthpop Compatability, black hole binary fraction updates, and bug fixes

[nsabrams]

This PR includes the following

• Inclusion of Rubin and Roman filters by creating interpolations between UBV filters and those respective filters
  • Author: @SRemulla in PR Add Rubin and Roman #66
• Support for orbital motion in lightcurves generated and refactor of refine_binary_events to use lightcurve.py functions and be compatible with updated BAGLE
  • Authors: @alinawhussain and @nsabrams
• Inclusion of SDSS filter support via Galaxia
  • Author: @nsabrams
• Support for multiple filters to be analyzed at once in refine_events() by using a filt_dict
  • NOTE in run.py this deprecates using photometric_system and filter in run.py, but it is still allowed when running refine_events() directly
  • Author: @SRemulla in PR Multiband refine events #68
• Changes and tutorial for compatibility with synthpop as a replacement for galaxia+perform_pop_syn in some cases
  • Author: @hustonm in PR Synthpop Compatibility/Tutorial #67
• Black hole splitting to allow user to choose binary black hole fraction
  • Fixed bugs in base function
  • Added capability to run this via run.py and slurm scripts
  • Author: @nsabrams
• Bug Fixes and Misc
  • Make Einstein radius more precise by using astropy constants
  • Added some asserts to verify companions are matched between primary and companion .h5 files (just for debugging, there was no issue)
  • Updated test_synthetic.py multiplicity fraction and CO fraction. The code that produced these didn't change, but it appears that the numpy seed generation changed causing the fractions to shift by 1-2%.