Fix font size of h2 in call out box

Close swcarpentry/styles#244

Add README to bin/lesson_initialize.py

This is a revamp of swcarpentry/styles#248.

Thanks to Andy Boughton.

Fix line wrap after dash in code block

Close swcarpentry/styles#249

Move boilerplate files to their own file

repo_check: use argparse and remove unused variable

lesson_check: get_val is a static method

lesson_check: Python3-style inits

lesson_check: add missing docstring

lesson_check: switch to argparse

lesson_check.py: Exit with a status of 1 if something was wrong

Fix links in LICENSE

Small nitpicks, but it trips my link checker.

Favicons and logos

Add note about the version of the style

Fix Copyright information

Fix search