Merge pull request #51 from pcutler/master

Fix a tiny typo in Readme
Use centered header for < 1200px
Improve author bio pages on mobile devices
Don't hyphenate post titles on mobile devices
Improve sticky post formatting on mobile devices
Increase button height to 36px to match input element height
Change default comments call-to-action to 'Leave a Comment'
Change default comments call-to-action to 'Write a Comment'
Rename functions and hooks to remove reference to 'share' in 'share a comment'
Reorganize Customizer
* Move Single-Column Layout option to new Layout Options section
* Update README.md with new screenshots and option sections
Update README.md with correct Layout Options screenshot
Update README.md to fix erroneous asterisks
Improve footer margins
Add background color to archive page title
Change background color of Sticky posts and <pre> to #F5F5F5
Decrease archive page top nav margins
Improve archive page title margins; center archive description <1200px
Merge branch 'category-background-color'
Add border radius to sticky posts
Improve cross-browser compatibility