Update localization for the renderer.

[drgrice1]

The renderer no longer should have translations for PG since PG now has its own translations. So the localilzations only include the maketext calls in the templates, lib/WeBWorK, and lib/RenderApp directories, as well as any in the lib/RenderApp.pm file. Although in actuallity all of them are in the templates directory.

The docs/make_translation_files.md file has been removed. Instead the bin/update-localization-files script handles this. Run ./bin/update-localization-files -h for usage. Basically run ./bin/update-localization-files to only update the pot file, or run ./bin/update-localization-files -p to update the pot file and the po files. You can also run ./bin/update-localization-files -l heb (for example) to update the pot file and the heb.po file.

Note that the pot file is renamed to lib/WeBWorK/Localize/renderer.pot instead of lib/WeBWorK/Localize/standalone.pot since this is the renderer app, not the standalone app. Generally, I would like to stop calling this the "standalone renderer" and just call it the "renderer" (or perhaps better the "pg-renderer"?).

The lib/WeBWorK/Localize.pm file has been updated with changes similar to those made for WeBWorK.

Also remove the language_subroutine from the WeBWorK::PG->new calls. That is not a valid translation option anymore, and doesn't do anything.

[somiaj]

Any reason these older translations are kept around? It appears the strings are no longer present in the renderer.pot template.

[drgrice1]

The script does that automatically (this is a gettext feature). It moves old translations into comments so that if the string is added back into the code, then the translation can be recovered without effort from the translator. They can probably be removed, but that requires manual effort. I just ran the script.

[somiaj]

Just double checking, I did see they were commented out. I'll just merge, they could be removed later if desired.