- Moves setup to a before_script
- Remove lalsuite from requirements for CI to prevent it from failing

added the possibility to change the color scheme of corner plots with the 'lionize' keyword argument

Previously I was setting the noise_log_likelihood to nan in a confusing
way. This removes that and also renames all the liklihoods for clarity.

Project restructuring

See merge request Monash/tupak!55

# Conflicts:
#   examples/open_data_examples/GW150914.py