Wrap the Redback Models

[jeremykubica]

This PR provides an initial proof of concept wrapper for redback models in TDAstro, including a demo notebook.

Replaces #433 and #410

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Before [f65eb43]	After [9f5cfa5]	Ratio	Benchmark (Parameter)
90.7±0.5μs	93.8±1μs	1.03	benchmarks.TimeSuite.time_make_and_evaluate_step_model
108±0.5μs	111±2μs	1.03	benchmarks.TimeSuite.time_sample_x0_from_distmod
30.2±0.4μs	30.9±0.4μs	1.02	benchmarks.TimeSuite.time_make_simple_linear_wavelength_model
1.02±0.01s	1.03±0.01s	1.02	benchmarks.TimeSuite.time_make_x1_from_hostmass
33.7±0.4ms	34.2±0.6ms	1.01	benchmarks.TimeSuite.time_additive_multi_model_source
555±10μs	562±10μs	1.01	benchmarks.TimeSuite.time_apply_passbands
4.50±0.09ms	4.53±0.1ms	1.01	benchmarks.TimeSuite.time_evaluate_salt3_passbands
124±8μs	125±5μs	1.01	benchmarks.TimeSuite.time_evaluate_simple_linear_wavelength_model
4.71±0.04ms	4.74±0.04ms	1.01	benchmarks.TimeSuite.time_lightcurve_source
19.2±0.3ms	19.4±0.09ms	1.01	benchmarks.TimeSuite.time_make_and_evaluate_static_sed

Click here to view all benchmarks.

[hombit]

Please replace TDAstro with LightCurveLynx.

[hombit]

Suggested change

	" * The start time (`t0`) uniformly from the coverage of the survey.\n",
	" * The start time (`t0`, days) uniformly from the coverage of the survey.\n",

[hombit]

Suggested change

	" * The location (`RA`, `dec`) uniformly from the footprint of the survey.\n",
	" * The location (`RA`, `dec`, both in degrees) uniformly from the footprint of the survey.\n",

[hombit]

I guess...

Suggested change

	" * The mass ejecta (`mej`) as a Gaussian with mean 0.05\n",
	" * The mass ejecta (`mej`, solar masses) as a Gaussian with mean 0.05\n",

[hombit]

I guess

Suggested change

	" * Gray opacity (`kappa`) = 1\n",
	" * Gray opacity (`kappa`, cm^2/g) = 1\n",

[hombit]

Suggested change

	" * Temperature floor in K (`temperature_floor`) = 3000\n",
	" * Temperature floor in K (`temperature_floor`, kelvins) = 3000\n",

[hombit]

Guessing again =)

Suggested change

	" * Minimum initial velocity (`vej`) = 0.2\n",
	" * Minimum initial velocity (`vej`, fraction of the speed of light) = 0.2\n",

[hombit]

Suggested change

"Redback models have the ability to draw their parameters using samples from the `bilby` package. We can either define these priors manually or use one of the many sets of priors that are predefined in the redback package ([more information on redback priors here](https://redback.readthedocs.io/en/latest/priors.html). Now let’s load the predefined priors for the \"one_component_kilonova_model\".\n",

"Redback models have the ability to draw their parameters using samples from the `bilby` package. We can either define these priors manually or use one of the many sets of priors that are predefined in the redback package ([more information on redback priors here](https://redback.readthedocs.io/en/latest/priors.html)). Now let’s load the predefined priors for the \"one_component_kilonova_model\".\n",

[hombit]

Thank you, the notebook looks great!