CZ privacy policy translation
updated french translations
Don't memoize a SiteSetting in the DiscourseHub module because that breaks multisite support
Fix onebox loading on every keystroke after a request fails.
Merge pull request #369 from kubabrecka/cz_privacy

CZ privacy policy translation
Merge pull request #370 from ZogStriP/keep-french-l10n-up-to-date

updated french translations
Remove dashboard welcome message
Use wrenches instead of cogs for admin buttons that let you change something/someone's settings
Some javascript refactoring: Move markdown functions into their own classs, remove extraneous `window.` calls.
Moved Markdown out of Discourse.Utilities -> Discourse.Markdown