Jsonify results

Following the discussion in #301 (closed), I've implemented default saving for the results object as a json file. The only functions I've changed are read_in_result, save_to_file, and the filename function. I have included a flag that if save='hdf5' in the arguments of run_sampler, the results will be saved in the standard hdf5 format.

bilby/core/sampler/__init__.py

@@ -85,6 +85,7 @@ def run_sampler(likelihood, priors=None, label='label', outdir='outdir',
         overwritten.
     save: bool
         If true, save the priors and results to disk.
+        If hdf5, save as an hdf5 file instead of json.
     result_class: bilby.core.result.Result, or child of
         The result class to use. By default, `bilby.core.result.Result` is used,
         but objects which inherit from this class can be given providing
@@ -183,7 +184,10 @@ def run_sampler(likelihood, priors=None, label='label', outdir='outdir',
 
     result.samples_to_posterior(likelihood=likelihood, priors=priors,
                                 conversion_function=conversion_function)
-    if save:
+    if save == 'hdf5':
+        result.save_to_file(extension='hdf5')
+        logger.info("Results saved to {}/".format(outdir))
+    elif save:
         result.save_to_file()
         logger.info("Results saved to {}/".format(outdir))
     if plot: