Changes in web_main to redirect smartlinks directly to CRE (Issue #486)

[Pa04rth]

Problem - The specific issue at hand is to modify the behavior of the /smartlink route so that if a smartlink is connected to only one CRE, it directly redirects to that CRE's page instead of landing on the generic smartlink page.

Solution - In my following commit , I have first check the number of nodes connected to that particular CRE and if it is one than I have changed the redirect url .