Links to example files in Toolshed Building and Distributing bundles documentation

[deng.luo@…]

Roden Luo points out that links to example code files are missing in the ChimeraX Toolshed Building and Distributing Bundles documentation.

​https://github.com/RBVI/ChimeraX-Bundle-Template/issues/1

"I come to this repo from ​https://www.cgl.ucsf.edu/chimerax/docs/devel/writing_bundles.html#bundle-sample-code. It is documented that "Because the sample code includes C++ source code." But there is no C++ code (_sample_pyapi.cpp and _sample_pybind11.cpp as mentioned) in this repo. A few other listed files in the doc do not exist, either.

Not a big deal. But somewhat confusing. The same holds for ​https://github.com/RBVI/ChimeraX-Bundle-Template-TOML."

[Eric Pettersen]

I believe the inability to fetch the zip file is easily remediable, but some commands have to be run as user 'apache' on the server. I can run the cgi script as myself and get the file, but apache needs to be able to run it (need to run a "git config" command as apache). Once, it's working, we can at least partially revert the changes Zach made (some changes that mention the pyproject.toml option should be retained).

So, have to wait until I can corner Greg or Scooter for a few minutes.

[Zach Pearson]

I could just as well put the contents of the zip file in those GitHub repos.

[Eric Pettersen]

The zip file is created on the fly from whatever the current source is, so if the sample code gets updated or enhanced, no one has to remember to tediously remake the zip archive.

[Eric Pettersen]

Re-enabled zip download while retaining references to GitHub sample code.