Added off-canvas menu for small screens

For convenience, added `askbot/media/node_modules` to gitignore.
allow bulk deletion of content by user upon blocking
Working on second header

Use of foundation buttons and forms style
Merge branch 'foundation' into foundation-offcanvas-navbar

Conflicts:
	askbot/templates/base.html
Merge branch 'foundation-offcanvas-navbar' of github.com:BenjaminABEL/askbot-devel into foundation-searchbar
Merge branch 'master' of github.com:ASKBOT/askbot-devel into foundation-searchbar
Downgrade to foundation 5.2.2 in reason of a bug in their new `off-canvas`
menus
Add missing word
Merge pull request #266 from mgeisler/patch-1

Add missing word
Added translation support for "Save" button in site settings and group settings (issue #268)
Merge pull request #269 from daftu/issue-268-fix

#268 Added translation support for "Save" button in site and group settings
Removed `inputtooltip` javascript event handlers in favor of `placeholder`

	modifié :         askbot/media/js/live_search.js
	modifié :         askbot/templates/widgets/search_bar.html
Merge branch 'foundation-searchbar' into foundation
Merge branch 'master' of github.com:ASKBOT/askbot-devel into foundation