CONTENT: Remove line breaks in Markdown atx-style headings
CONTENT: Add Google Analytics
CONTENT: Fix indentation in `content/css/stylesheet.scss`
CONTENT: Fix problem with layout of HTML pages

Blocks (header, main, footer) had unequal widths, and horizontal
scrollbar was shown.
CONTENT: Use Arial Black font as primary alternative for Russo One
CONTENT: Turn on comments via Disqus
CODE: Add Eclipse project
CONTENT: Fix typos and spelling errors in Russian pages