A hack fix for the internal error in LALSUITE - this should be reversed
once we have solved the fundamental issue: if the data contains no sfts
for that period, return 0 not nan

- Adds latex prior table writer (not found to be useful)
- Add special case of 0 to texify_float
- Expose texify_float in core
- Fix confusing argument order in GridSearch

If SFTs where not loaded, i.e. if injectSources was used, no timestamps
are generated. In such a case don't attempt to used them.

- Fixes undefined theta_values -> theta (missed as Ng > 1 isn't tested)
- Import from core rathern than explicitly
- Various PEP8 fixes

If nsegs > 1, a semi-coherent search is performed.

- Adds debug information
- If no data is in a given segment, a nan will be produced. Rather than
  summing this, the code will now replace it with zero and spit out a
  debug message to the effect.

As far as I can tell this should not be here (transient=True) in this
case. Nevertheless, I'm leaving it commented as this is quite a core
routine and I wish to remind myself to investigate it further.

- Adds a simple interface to get grid search given uniform prior
- Fixes detector -> detectors bug (previous versions, the constrains
  where not actually set)
- Adds title functionality to plot2D

- Fixes missing sqrt in the convergence test
- fixes error in periord
- prevents plotting between burn and prod
- allow user to specify upper limit
- refactor code

This was mistakenly added during a testing phase - removed since it is
not used.

- restructures the method into several different functions.
- implements stopping if convergence is met a prespecified number of times
- adds documentation
- will plot the convgerence on the RH axis of the walkers plots

Convergence testing based on the Rubin-Gelman statistic is implemented
via `setup_convergence_test`. This does not truncate the search yet, but
simply adds a trace to the walkers plots for testing

- Addresses incorrecelt named attributes and prevents error if
  sftfilepath is not specified

Also adds thetas_at_ref data to the Writer object

Now forces use of dtglitch = None for no glitches