Added exception handling in case MultiNest does not generate output files. This happens when MultiNest receives a termination request in v. 3.4 or later.
Added a summary file to which tasks may (optionally) write some information/statistics during the export process. Implemented chi2r exporting for photometric data.
Added chi2r exporting method to OIFITS data module.
Updated to latest liboi with t3 chi2 bugfix.