Publish "Goodbye Twitter Mobile"
Delete unnecessary layouts
Add error.less stylesheet to page
Major stylesheet changes

- Switch from PX units for typography to REM.
- Add flex-box layout to footer and main content container (still need
to add vendor prefixes).
- Remove unnecessary partials to reduce stylesheet size (namely, buttons
& forms).
Rename `404.hbs` to `error.hbs`
Move articles to folders by year

Articles are now in folders according to the year it was published in
(either 2013 or 2014). Still need to find a better solution for using
{{#compose}}.
Fix indention issues in header-inc.hbs
Remove paragraph element from footer-inc.hbs
Remove unnecessary JS from close-inc.hbs
Update layout-blog.hbs to reflect flex-box layout

Also fixed some indention issues caused by using tabs and spaces
combined. Now using only spaces.
Update {{shortName}} tag in layout-custom.hbs
Add years to blog index page
Delete `tpl/pages/drafts/` directory
Fix indention issues in site.yml
Add gzip extension to assets
Add new styles to article.less
Add new bower dependencies

Also fixed messy code in gruntfile.js