Add the option to use the ROQ

Additonally allows users to specify their own likelihood as in bilby_pipe and improves the meta-data read through.

src/analysis.py

@@ -43,7 +43,7 @@ logger = bilby.core.utils.logger
 
 
 def roq_likelihood_kwargs(args):
-    """ Return the kwargs required for the ROQ setup
+    """Return the kwargs required for the ROQ setup
 
     Parameters
     ----------
@@ -73,7 +73,7 @@ def roq_likelihood_kwargs(args):
 
 
 def setup_likelihood(interferometers, waveform_generator, priors, args):
-    """ Return the kwargs required for the ROQ setup
+    """Takes the kwargs and sets up and returns  either an ROQ GW or GW likelihood.
 
     Parameters
     ----------