New social features in Physiopedia

Physiopedia has finally had a social face lift.  This is the first part of a scheme to make Physiopedia a more social experience where our users will be able to connect with us and with each other. On the left we have added icons to the sidebar to enable you to quickly sign up for email alerts and RSS feeds and also to connect with us in Twiitter and Facebook.  On the right we have added a button that allows you to easily save the current page as a bookmark or to share it with your friends via various applications, including Facebook and Twitter.  We hope you find these additions useful.