Pull together parts of dynamic programming.
Add lessons from dynamic programming.
Add basics of the jekyll command.
Add jekyll directory structure.
Explain why jekyll is powerful.
Describe _config.yml.
Describe _data/ directory.
Apply format and typo fixes.
Add jekyll doc link of data files.
Describe YAML Front Matter.
Describe Liquid templating.
Describe global objects.
Describe blog setup requirements.
Add other issues related to jekyll.
Describe how to make MathJax work.
Merge branches 'hub' and 'cs'