HOTFIX 2015.3, 2015.4 - Added a setting to the customer login widget which sends customer back to previous page

Added a setting for the customer login widget to return the customer back to the page they were on previously after a successful login which defaults to true. If this is undesirable, the old behavior of either sending the user to the home page or sending them to checkout if they have items in their cart can be accomplished by unchecking the setting in the customer login widget. The ##CUSTOMERLOGIN## merge can now accept redirect=/some/path and returntocurrentpage=True merge settings. For example, ##CUSTOMERLOGIN[returntocurrentpage=True]## will send the user back to the page they were on when the button was clicked after login. ##CUSTOMERLOGIN[redirect=/store/OnePageCheckout.aspx]## will send the user to checkout after they login.