smcarrera mashupV2 - with changes

changes include:
* changes to pass test (changed some lines to object.notation - was
following WU API instructions when using brackets
*simplification of some JS lines (removed a few unnecessary variables
by consolidating lines)
*wrapping all JS in a function to avoid creating global variables
*addition of WU API call to pull time of day and JS to change
background image based on time of day. (Note only the ‘Clear’ weather
forecast has an actual different image for night hours at this moment)
* addition of some weather images (based on current conditions
yesterday & today)
*some CSS cleanup, note a lot more needed