move beast_data.py to the BEAST repo

[lea-hagen]

The BEAST needs the functions that were in beast_data.py to read in the noise/SED/lnP files, so I've moved it there. This PR deletes beast_data.py, and in the places where it was used (megabeast.py and plot_import_data.py), imports beast.tools.read_beast_data instead.

This should not be merged until BEAST-Fitting/beast#468 is merged.

[coveralls]

Pull Request Test Coverage Report for Build 67

• 2 of 17 (11.76%) changed or added relevant lines in 2 files are covered.
• 8 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-2.1%) to 15.0%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
megabeast/megabeast.py	1	8	12.5%
megabeast/plot_input_data.py	1	9	11.11%
<!--	Total:	2	17	11.76%	-->

Files with Coverage Reduction	New Missed Lines	%
megabeast/megabeast.py	4	16.33%
megabeast/plot_input_data.py	4	6.45%
<!--	Total:	8		-->

Totals
Change from base Build 64:	-2.1%
Covered Lines:	45
Relevant Lines:	300

---

💛 - Coveralls

[lea-hagen]

I just did a manual rebase (it couldn't merge automatically after blackening in #41), so this can be merged once https://github.com/BEAST-Fitting/beast/pull/493 is merged.

[lgtm-com[bot]]

This pull request introduces 3 alerts when merging e3a57cbfaec928913f5df5085ad9413ee1358bb2 into 267514c9a31be2487abeda3fac5ca2a82fdb2ff5 - view on LGTM.com

new alerts:

• 3 for Unused import

[karllark]

Needs a minor update to the docs to remove the api build for beast_data.

[lea-hagen]

Needs a minor update to the docs to remove the api build for beast_data.

Where do I make that change? I haven't done anything with the api before, and I didn't find anything obvious in the code/docs.

[karllark]

It is at the end of the docs/index.rst file.

[lea-hagen]

Thanks! Just removed it.