Improve heading size proportions
Don't use headers for buttons in sidebar
Flip logo
Use em instead of i tag everywhere
Restyle homepage

Changes:
* New background color
* Fix width of main text area to be more readable
* Don't bold headers
* Improve margins around headers and paragraphs
* Fix margins in sidebar
* Use small caps for small headers
* Left-align header for stronger alignment/grid
Enabled centering of the container while keeping sidebar vertically fixed
Revert "Flip logo"

This reverts commit 89ccc7e51fba050d1c1db943429c024600067fb7.
Improve styling of sidebar navigation
Fix responsive design for smaller resolutions
Add logo images to download section
Merge branch 'master' of github.com:editorconfig/editorconfig.github.com

Conflicts:
	index.html