start to split the likelihood into bitesize chunks

The current likelihood function does a lot. I think we could split it into neater chunks that will make it easier to use and adapt if we want to start analytically marginalising some parameters.

The current version shouldn't break anything but I feel like this should probably get some discussion before being merged.

@gregory.ashton @paul-lasky @moritz.huebner

This looks great. I think we might be doubling up on the .real now, but safe than sorry :P I'm happy for this to merged.

added 80 commits

• b3385ce3...a5b62c57 - 78 commits from branch master
• 1d18f310 - Merge branch 'master' into modularise_likelihood
• 41795cb9 - update to use new formalism

Compare with previous version

I think we should make it as real as possible.

Everyone happy for this to be merged?

Seems reasonable

Merging

merged

mentioned in commit edf9b93c