Set basic paragraph and header rythm and change main font to PT serif from PT sans-serif
add font size variables and set grid width of blog article to 10
several font size, margin alterations for the blog
update the readme file
fix typo in readme file
Center website content and add copyright info in the footer
Hide intro for now, until I have video content for it.
unhide intro, add background image, create menu, and add adaptive font-sizes
Merge branch 'develop'