This allows the waveform generator to be given None for the sampling
frequency and duration (in this state, it therefore can't be used to
generate an injection). Then, when passed to the likelihood, a check if
performed to see if those attributes are set. If they are None, they are
set from the data, and if they disagree with the data, an error is raised.

Renaming variables for consistency

See merge request Monash/tupak!98

- time_duration -> duration
- fix spelling error tiime -> time
- frequencies -> frequency_array

Update cosmology

See merge request Monash/tupak!97

Adds a command-line-interface to plot results files

See merge request Monash/tupak!90

Update hyperpe

See merge request Monash/tupak!93

Update CI

See merge request Monash/tupak!96

This updates to an anaconda python image and removes redundant tests
rerunning examples so that the tests finish in a more reasonable amount
of time. Many requirements are also moves to an
optional_requirements.txt file.

Cosmology

See merge request Monash/tupak!95

Add functionality to strain data

See merge request Monash/tupak!94

Add Occam factor

Closes #93

See merge request Monash/tupak!86

- Removes repeated code in generating PSDs from frame files.
- Fixes a few minor bugs elsewhere

Note - this is the default for get_interferometer_with_fake_noise.., not
the default in general.

Makes the options to set the PSD methods. Retains the default behaviour
(will use aLIGO if nothing is set). But now, users must call a
`set_from_` method after initialising the PowerSpectalDensity()`.

Also adds logging messages

Previously, set_from_frame not only loaded in the time domain data, but
also applied a filter and FFT'd. This is no longer required and has
hence been removed.