Update 03-organization.md

[raynamharris]

added blurb about templates in the .github directory. Text copied from https://help.github.com/articles/creating-a-pull-request-template-for-your-repository/

[rgaiacs]

The information is in the wrong section.

Starter Files

The bin/lesson_initialize.py script creates files that need to be customized for each lesson:

isn't the right place because https://github.com/swcarpentry/lesson-example/blob/gh-pages/bin/lesson_initialize.py doesn't create the files.

[raynamharris]

Thanks, @rgaiacs. I didn't realize that they were all tied to the .py script.

Would these be considered 'helper files'? Or maybe there could be a new section called 'Additional files' or 'Optional files'?

[rgaiacs]

Or maybe there could be a new section called 'Additional files' or 'Optional files'?

+1 for either.

[raynamharris]

Thanks @rgaiacs. I went with "optional files"