[NEW] date-relativetime.js and index.html.

added relative time prototype and html file to test the method

Signed-off-by: Jay Gauten <jaygauten@gmail.com>
[NEW] date-formatter.js

helper to customise the format of date

Signed-off-by: Jay Gauten <jaygauten@gmail.com>
[UPDATE] validated the code via jsfiddle

Signed-off-by: Jay Gauten <jaygauten@gmail.com>