Add class loading to :root and change cursor on ajax requests.

In the ajax() function, add 'loading' to <html> when sending
requests, and remove it upon response.

In CSS, change the cursor to progrees.

Just a visual indication that content is loading.
Use HTTP version of links on RSS and Sitemap

Use a regular expression to convert https to http when creating
links in update_rss() and update_sitemap().
Fixed typo in placeholder for email in login form