ENH: feed icon added to static files

Image is taken from wikipedia website
url:
http://upload.wikimedia.org/wikipedia/en/thumb/4/43/Feed-icon.svg/200px-Feed-icon.svg.png

Image scaled to 14x14 px in Gimp
ENH: rss feeds link added to rightside bar
ENH: move back-to-top link right in footer
ENH: add feeds url to footer
MAINT: url name changed for better readability
ENH: add user link and copyrights to feeds
ENH: feed syndication for Tags
MAINT: removing double quotes and making extra_info bold
ENH: feed syndication for individual submissions