Add a new renderer for displaying dates in a human readable way

Add a new renderer for displaying dates in a human readable way

render_timestamp returns a Date as
"2017-01-31 16:17:33"
which is good for computers and column sorting but unfit
for human consumption

the new renderer added by this patch renders a Date as
"Tuesday 31 January 2017 16:18:08"

Day-month-year order is the most used ordering
in the world and also commonly used in the USA for
official documents.
source:
https://en.wikipedia.org/wiki/Date_and_time_notation_in_the_United_States
https://en.wikipedia.org/wiki/Date_format_by_country