Adds search bar to homepage template.
Removes unnecessary image from the bottom of the question detail page for educators and professionals.
Fixes how question details are displayed and links in the correct user content.
Adds gravatar placeholders for templates in the question detail pages.
Merge branch 'v2UI-style' into v2UI
Creates url pattern for the referral page.
Merge branch 'v2UI-style' into v2UI

Conflicts:
	forum/skins/default/templates/v2/homepage_base.html