This renames the input sftfilepath to sftfilepattern and adds
documentation on how that should be used, i.e. a colon separated list of
wildstring or exact matches. In globbing for all matches, the colon
split is added in. sftfilepath is still used by `Writer` since
an exact path is known.

- Also changes the parameter vector in the normal fully coherent search
  to remove the tstart and tend. This is done by wrappin the
  run_computefstatistic_single_point in a compute_fullycoherent_det_stat
  function
- Removes theta0 from the saved data dict for the MCMCSearch
- Adds example usage of the semi-coherent search