Made requested revisions to lesson_initialize
Made requested revisions to lesson_initialize

Changed the keyword for emailing from 'contact' to 'email' per https://github.com/swcarpentry/styles/issues/178 and changed the description for how to use GitHub to reflect usage of the web interface.
Reproducible-Science-Curriculum/rr-automation,Reproducible-Science-Curriculum/rr-automation,Reproducible-Science-Curriculum/rr-literate-programming,Reproducible-Science-Curriculum/rr-literate-programming