Need https for addthis and diqus in default template

[rnwolf]

The default templates for addthis and disqus need https not http.
This is because Chrome and Chromium block access because as they consider this insecure.
Firefox works fine.

base_helper.tmpl
line 83 from ..src="http://s7.addthis.com/... to ...src="https://s7.addthis.com/...

The same for disqus template disqus_helper.tmpl
line 23 from ....dsq.src = 'http://' + disqus_..... to ....dsq.src = 'https://' + disqus_.....

[ralsina]

I used "//s7..." which should do the right thing both if your site is HTTPS (safer) and HTTP (Faster)