removed hidden posts from rss feed
simplified logical expression to filter hidden posts
fixed site.disqus_identifier_prefix
removed cookie domain from social share plugin
removed hidden posts from tag list
added menu_entries array to config file

removed showInMenu flag
enabled menu to link to external sites
Merge remote-tracking branch 'jekyll-template/master' into gh-pages

Conflicts:
	_includes/header.html
adjusted menu