Change ContentService to look for HTML files first, then markdown. Add the ContentPagesController and make it serve up the Home page.
Make Policies pages served by ContentService, and try to fix what I think is a race condition due to using MarkDownProcesser in a non-thread-safe way.
Fix ContentService handling of html files.
Arbitrarily split the Layout page into Layout, LayoutFooter, and SiteMenu.
And Rework the /Error pages (except the oh now we broke something) to be provided using an ErrorsController so that we don't need a separate ErrorsLayout.
Refactor CSS into three parts and make NuGet more easily cobrandable by adding overrides in the branding folders.
Fixing some build errors after rebase
Support CSS overrides loaded from Branding/Content
CR feedback - don't use ConfiguraitonManager.AppSettings.
Add Gallery.Brand to the .csdef file also.
Allocate new MarkdownProcess objects instead of sharing across threads.
Comment the security check so it's obvious what its for.
Oops! Needed to update the local cscfg too.
Merge branch 'tilovell/easierCobranding' into dev

Resolved conflicts in:
	src/NuGetGallery/Content/Site.css
	src/NuGetGallery/Services/ContentService.cs
	src/NuGetGallery/Views/Shared/Layout.cshtml