Fixed small res sidebar font color
flask.css: Removed duplicate media query

There is no point in having two of those...
flask.css: Removed duplicate CSS rule
flask: Fixed small screen sidebar width issue
flask.css: Switch to responsive layout if below page_width

Once the browser size is to narrow to display the whole page width we
should switch to the responsive layout instead. This prevents layout issues
between the screen widths of 875px and 940px.
Merge branch 'responsive'
layout: Force original github banner size
flasky.css: Removed custom scrollbars
layout: Moved github ribbon inline styles to flask.css